All Topics  
Thai royal and noble titles

 

   Email Print
   Bookmark   Link






 

Thai royal and noble titles



 
 
Thai
Thailand

The Kingdom of Thailand is an independent country that lies in the heart of Southeast Asia. It is bordered to the north by Laos and Myanmar, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the west by the Andaman Sea and Myanmar....
 royal and noble titles
signify relationship to the King. The system is somewhat complicated and usually not well understood even by most Thai people. A particular title
Title

A title is a Prefix or Suffix added to a person's name to signify either veneration, an official position or a professional or academic qualification....
 may not be confined to just the beginning or the end of the name, but may be split across the name as will be demonstrated. Another point of note about the titles is that the King has the power to bestow any title on anybody, regardless of the rule.






Discussion
Ask a question about 'Thai royal and noble titles'
Start a new discussion about 'Thai royal and noble titles'
Answer questions from other users
Full Discussion Forum



Encyclopedia


Thai
Thailand

The Kingdom of Thailand is an independent country that lies in the heart of Southeast Asia. It is bordered to the north by Laos and Myanmar, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the west by the Andaman Sea and Myanmar....
 royal and noble titles
signify relationship to the King. The system is somewhat complicated and usually not well understood even by most Thai people. A particular title
Title

A title is a Prefix or Suffix added to a person's name to signify either veneration, an official position or a professional or academic qualification....
 may not be confined to just the beginning or the end of the name, but may be split across the name as will be demonstrated. Another point of note about the titles is that the King has the power to bestow any title on anybody, regardless of the rule. However, such promotion is personal and the children of the person will not normally benefit from it (see, for example, Phra Worawong Ther Phra Ong Chao).

The King (Sovereign)

There are two titles which can be used for a king (depending on coronation status).

Phrabat Somdej Phra Chao Yu Hua ("Crowned King")

Phrabat Somdej Phra Chao Yu Hua (??????????????????????????) is the normal title used by the kings of Thailand (Siam) after coronation. There are two ways that this title can be used:
  • It can precede the name of the king, for example: Phrabat Somdej Phra Chao Yu Hua Bhumibol Adulyadej
    Bhumibol Adulyadej

    Bhumibol Adulyadej , is the current Monarchy of Thailand. Publicly acclaimed "the Great" , he is also known as Rama . Having reigned since 9 June 1946, he is the world's List of longest reigning current monarchs current head of state and the List of longest reigning monarchs of all time monarch in History of Thailand....
    . This type of usage is less formal than the next possibility.
  • It can be split across the name, possibly with omission or modification of the words "Phra Chao Yu Hua". For example: Phrabat Somdej Phra Paraminthara Maha Bhumibol Adulyadej, Phrabat Somdej Phra Paraminthara Maha Prajadhipok
    Prajadhipok

    Prajadhipok was the seventh king of the Chakri dynasty. He was the last absolute monarch and the first constitutional monarch of Siam.Prajadhipok's reign was the shortest in the history of the Chakri Dynasty....
     Phra Pokklao Chaoyuhua.


Somdej Phra Chao Yu Hua ("Uncrowned King")

Somdej Phra Chao Yu Hua (????????????????????) is restricted to a king who has not yet gone through coronation. Once crowned, he will use the title Phrabat Somdej Phra Chao Yu Hua. This particular title normally precedes the king's name, since he has not yet been given a ceremonial name.

Sovereign's Consorts

Traditionally, titles of the royal wives depended both on their birth titles and royal favour. Only the princesses who are of high birth (Chao Fa, Phra Ong Chao, Mom Chao Ying) would be able to take up titles higher than Chao Chom. There were no clear rule about the hierarchy of the titles above Chao Chom until the time of King Mongkut
Mongkut

Phrabat Somdet Phra Pormen Maha Mongkut, Phra Chom Klao Chaoyouhua, or Rama IV was the fourth king of Siam 1851-1868) of the Chakri dynasty and one of the most revered monarchs of Siam....
; even then the titles kept changing over the successive reigns.

The rule about commoners also seems to be evolving over time; it appears that there are no more restrictions keeping a commoner from becoming queen.

Most of the titles listed here are taken from the time King Vajiravudh
Vajiravudh

Vajiravudh was King of Siam from 1910 until his death. Vajiravudh is known for his efforts to create and promote Siamese nationalism. His reign was characterized by Siam's movement further towards democracy and minimal participation in World War I....
 enacted the Succession Law in 1924.

The Queen


Only the holders of the titles listed here -- all containing the word "rajini" -- are the queens
Queen consort

A queen consort is the title given to the wife of a reigning Monarch. Queens consort usually share their husbands' Royal and noble ranks and hold the feminine equivalent of their husbands' monarchical titles....
 in the Western sense, although the concept of queen was only introduced first in the reign of King Rama V
Chulalongkorn

Phrabat Somdet Phra Poramintramaha Chulalongkorn, Phra Chulachomklao Chaoyuhua was the fifth monarch of the Chakri dynasty. He was known to the Siamese of his time as Phra Buddhachao Luang ....
. There can be only one "rajini" at a time. The actual title depends on the status of the holder.

Somdej Phra Boromarajininat
Somdej Phra Boromarajininat (????????????????????? -- the Queen Regent) is the highest rank among the royal wives. This title shows that its holder is a queen who has also acted as a regent for the sovereign. (The word "nat" at the end of the title means "supporter".) This title is normally used in the form of:

"Somdej + [honorific name] + Phra boromarajininat"


or

"Somdej Phra Nangchao + [name] + Phra boromarajininat".


For example, Ani's mom (born as Phra Ong Chao Sawaphaphongsri, one of King Chulalongkorn's
Chulalongkorn

Phrabat Somdet Phra Poramintramaha Chulalongkorn, Phra Chulachomklao Chaoyuhua was the fifth monarch of the Chakri dynasty. He was known to the Siamese of his time as Phra Buddhachao Luang ....
 half-sisters and wives), was given an honorific name of "Phra Sri Patcharindra" when she was invested the queen regent; her name was thus Somdej Phra Sri Patcharindra Phra Boromarajininat. As for the current Queen of Thailand, her name has been retained, thus: Somdej Phra Nangchao Sirikit
Sirikit

Queen Sirikit of Thailand , is the wife as well as the Queen consort of Bhumibol Adulyadej, King of Thailand. She is the second Queen Regent of Thailand ....
 Phra Boromarajininat.

Somdej Phra Boromarajini
Somdej Phra Boromarajini (??????????????????) is the title of a queen who has never acted as a regent. The King conferred this title to Queen Sirikit on his coronation. She was then known as Somdej Phra Nangchao Sirikit Phra Boromarajini.

Somdej Phra Rajini
Somdej Phra Rajini (???????????????) is a somewhat temporary title held by the most prestigious royal wife of a king who has not yet been crowned (see also Somdej Phra Chao Yu Hua, above). This title is appended to the front of the queen's name. Queen Sirikit held this title as "Somdej Phra Rajini Sirikit" for seven days prior to King Bhumibol's coronation.

Other Sovereign's consorts who were born princesses (obsolete)


The following titles can traditionally only be held by the royal consorts who were born princesses, that is, holding the title of Chao Fa
Thai royal and noble titles

Thailand royal and noble titles signify relationship to the King. The system is somewhat complicated and usually not well understood even by most Thai people....
, Phra Ong Chao, or Mom Chao Ying. Together with the queen, they are known as Phra Panya Chao (???????????? -- 'royal wives').

Somdej Phra Boromarajathevi
Somdej Phra Boromarajathevi (???????????????????) had been the most prestigious title among the royal wives until King Chulalongkorn created the Rajini (Queen) titles. Only one person can hold this title at any one time, for example Somdej Phra Nangchao Sunandakumariratana Phra Boromarajathevi (born Phra Ong Chao Sunandakumariratana, another half-sister and wife of King Chulalongkorn). The holder of this title is the first royal consort (as compared to being a queen).

Phra Nangchao Phra Rajathevi / Phra Nangchao Phra Akra Rajathevi
Phra Nangchao ... Phra Rajathevi / Phra Nangchao ... Phra Akra Rajathevi (??????????...?????????? / ??????????...??????????????) is a lesser title than Somdej Phra Boromarajathevi. Queen Sri Pacharindra (see above) used to hold this title as Phra Nangchao Saovabhabongsri Phra Akra Rajathevi before she was made queen regent.

Phra Nang Ther
Phra Nang Ther (?????????) is the title of a royal wife of lesser importance than Phra Nangchao Phra Rajathevi. This title usually prefixes an honorific name, for example: Phra Nang Ter Laksamilawan, one of the wives of King Vajiravudh
Vajiravudh

Vajiravudh was King of Siam from 1910 until his death. Vajiravudh is known for his efforts to create and promote Siamese nationalism. His reign was characterized by Siam's movement further towards democracy and minimal participation in World War I....
.

Phra Akra Chaya Ther
Phra Akra Chaya Ther (??????????????) is the next prestigious title to Phra Nang Ther. In contrast to the previous titles, this title prefixes the previous title of the holder including the royal title from birth, for example: Phra Akra Chaya Ther Phra Ong Chao Sawapak Narirat (born Mom Chao Sawanapak Narirat, a cousin and wife of King Chulalongkorn), as oppose to Phra Nangchao Sawaphaphongsri Phra Akra Rajathevi, who were born Phra Ong Chao Sawaphaphongsri.

Phra Racha Chaya
Phra Racha Chaya (??????????) existed only during the reign of King Chulalongkorn. The only holder of this title was Phra Racha Chaya Chao Dara Rasmi, a princess ('Chao
Chao

Chao or Ch?o may refer to:* Chao, the Cambodian name for Tapai, fermented food made from rice* Chao, an alternative spelling of the Chinese Zhao ...
') from the Thipjakrathiwong dynasty of Chiang Mai
Chiang Mai

Chiang Mai , also sometimes written as "Chiengmai", is the largest and most culturally significant city in northern Thailand, and is the capital of Chiang Mai Province....
. Technically, she was a "commoner" from the point of view of the Chakri dynasty
Chakri Dynasty

The Chakri Dynasty }} is the current Dynasty of the Kingdom of Thailand, the Head of the house is the King of Thailand. The Dynasty has ruled Thailand since the founding of the Ratthanakosin era and the city of Bangkok in 1782 following the end of King Taksin of Thonburi's reign, when the capital of Siam shifted to Bangkok....
, and was thus initially appointed as a Chao Chom. She was later 'ennobled' and given this particular title, which, although higher in status than Chao Chom, was still the most junior among the royal wives who were born princesses.

Sovereign's consorts who were born commoners (obsolete)


Chao Chom
Chao Chom (???????) is the only title held by the royal wives who were born as commoners (Mom Rajawongse and below). If they were successful in producing a child for the king, the title would be changed to Chao Chom Manda (????????????). This title also prefixes previous royal titles; for example: Chao Chom Mom Rajawongse Sadab (born Mom Rajawongse Sadab Laddawan).

Descendants of a Sovereign


However, the inheritance is on the male line only: a female Mom Rajawongse married to a plain commoner would produce a child with no title. (However, see Khun (courtesy title) below.) Tradition also requires that a princess asks for royal permission and surrenders her title if she wishes to marry a man of lesser title, e.g. if a female Chao Fa wishes to marry a male Mom Rajawongse. This happened in recent time to Chao Fa Ubolratana Rajakunya
Ubol Ratana

Princess Ubolratana Rajakanya of Thailand , born April 5, 1951 in Lausanne, Switzerland, is the eldest child of Bhumibol Adulyadej and Sirikit. She relinquished her royal title and settled in the United States with her husband, Peter Ladd Jensen, but came back to Thailand after divorcing in 1998....
, the daughter of the current king, who had to give up her title of Chao Fa to marry a commoner (who was also a foreigner and one of her professors when she was studying at the Massachusetts Institute of Technology in the USA). She still retains the style
Style (manner of address)

A style of office, or honorific, is a legal, official, or recognized title, in other words a term which by tradition or law precedes a reference to a person who holds a post, or which is used to refer to the political office itself....
 of "Tunkramom Ying", though. However, her sister, Chao Fa Chulabhonwalailak, was granted permission by the King to keep her title when she married Sqn. Ldr. Weerayut Disayasirin, a commoner.

The rules are also slightly complicated for the first two classes Chao Fa and Phra Ong Chao.

Royal Princes and Princesses


Holders of these titles are still considered royal as they are at most two generations down from a king. Collectively, those who are children of a king are called "Loog Luang" (??????? -- 'royal children') and those who are grandchildren of a king are called "Laan Luang" (???????? -- 'royal grandchildren'). In English translation, they are normally called "princes". Special forms of language are also used when one wishes to speak to them, although the language is less elaborate than when speaking to the king or the queen. A male Loog Luang who does not accede to the throne would also start a new royal surname, which normally reflects his birth name (as opposed to an honorific name given later). The surname can be used by his wife if she is a commoner by birth, possibly with Na Ayudhya added if she has no noble title. It is otherwise not normally used until his children or grandchildren first hold the title of Mom Chao, when the surname will first appear in their names.

Chao Fa (HRH Prince) (HRH Princess)
Chao Fa (???????) is the most senior class of the royal family after the royal couple. Traditionally, their mother must be a princess. Holders of this title actually consist of three classes:

  1. Chao Fa of the First Class (?????????????? -- Chao Fa Chan Aeg).  These are the princes/princesses born to the queen or to a royal consort who is also a Luk Luang or royal children. They would traditionally be referred to as "Tunkramom Chai(m)/Tunkramom Ying(f)" (??????????????/???????????????), although nowadays they are more commonly called Chao Fa.
  2. Chao Fa of the Second Class (????????????? -- Chao Fa Chan Tho).  These are the princes/princesses born to a royal consort who is also a Laan Luang or royal grand children. They would traditionally be referred to as "Somdej Chai(m)/Somdej Ying(f)" (?????????/??????????).
  3. Chao Fa of the Third Class (?????????????? -- Chao Fa Chan Tri). These are the princes/princesses that are specially appointed or born to Krom Phrarachawangbowon (???????????????).


Four (4) persons currently hold Chao Fa rank (highest royal rank after the King and Queen):

  • HRH Prince Maha Vajiralongkorn
    Maha Vajiralongkorn

    Maha Vajiralongkorn is the only son of Bhumibol Adulyadej, the King of Thailand, and Queen Sirikit. He is currently crown prince of Thailand, and the Heir apparent to the throne....
     (born 1952) (only son of King Rama IX)


  • HRH Princess Maha Chakri Sirindhorn (born 1955) (2nd born daughter of King Rama IX)


  • HRH Princess Chulabhorn (born 1957) (youngest daughter of King Rama IX)


  • HRH Princess Bejaratana (born 1925) (daughter of the late King Rama VI)


[NOTE: Princess Ubol Ratana (eldest child of HM King Rama IX) lost her Chao Fa (HRH) title when she married commoner Peter Ladd Jensen].
[NOTE: HRH Princess Galyani Vadhana
Galyani Vadhana

Princess Galyani Vadhana of Thailand, Princess of Naradhiwas was a Princess of Thailand and the elder sister of King Ananda Mahidol and King Bhumibol Adulyadej ....
 (born 1923)(elder sister of HM King Bhumibol Adulyadej(Rama IX)) died January 2, 2008.]


Phra Ong Chao (HRH Prince) (HRH Princess) /// (HH Prince) (HH Princess)
Phra Ong Chao (???????????) is a lesser class of the princes/princesses than Chao Fa. They could be either:

Phra Chao Boromawongse Ther Phra Ong Chao (????????????????? ???????????)"His/Her Royal Highness" These are the princes/princesses who are of Phra Ong Chao rank (instead of higher Chao Fa rank) by birth (i.e., children of a king and a Chao Chom Manda (a consort who was born commoner) or who are specially promoted by a king to this high rank.

Phra Chao Worawongse Ther Phra Ong Chao (???????????????? ???????????) "His/Her Royal Highness" Generally, these are the princes/princesses who are grandchildren of a king or who are specially promoted by a king to this rank. The categories are as follows:

  • Children of a Chao Fa and a royal princess (Phra Ong Chao, or Mom Chao Ying). In turn, the children of this rank may hold the title of Mom Chao if royal permission is granted.


  • Children of a Phra Chao Boromawongse Ther Phra Ong Chao and a royal princess whose rank is Phra Ong Chao.


  • Mom Chao to whom the king granted a special promotion to become a Pra Chao Worawongse Ther Pra Ong Chao (e.g. Mom Chao Chula-Chakrabongse's appointment to Phra Chao Worawongse Ther Phra Ong Chao rank by H.M. King Rama VI). However, the children of this category of Phra Ong Chao will be treated as in the normal course as children of a Mom Chao and will hold the title of Mom Rajawongse.


Phra Worawong Ther Phra Ong Chao (???????????? ???????????) "His/Her Highness". These are:

  • Mom Chao whom the king granted this higher title, either as recognition of merit, or as a special favour. An example of this is Phra Worawong Ther Phra Ong Chao Nakkatra Mongkol Kromma Mhun Chandaburi Suranat, father of Queen Sirikit, who was born Mom Chao Nakkatra Mongkok Kitiyakorn (note that his surname is omitted now that he has become a Phra Ong Chao). This title is however personal to the recipient, and his children would still be treated as children of a Mom Chao as usual (i.e. inherit the title of Mom Rajawongse rather than Mom Chao).


  • Children of a Somdej Chao Fa whose grandmothers were queens of Rama V received the royal permission of H.M. King Rama VII to hold the title of Phra Worawongse Ther Pra Ong Chao even though their mothers were commoners. An example of this is Phra Worawongse Ther Pra Ong Chao Bhumibhol Adulyadej, currently H.M. King Rama IX who is the son of Somdej Phra Boromawongse Ther Chao Fa Kroma Luang Songkhlanakarin and Mom Sangwal who was a commoner.


At least seven persons currently hold Phra Ong Chao rank (mid level royal rank) including:

  • HRH Princess Bajrakitiyabha (born 1978) (daughter of The Crown Prince and HRH Princess Soamsavali)
  • HRH Princess Siriwannawari (born 1987) (daughter of The Crown Prince and Mom Yuvadhida)
  • HRH Prince Dipangkara (born 2005) (son of The Crown Prince and HRH Princess Srirasmi)
  • HRH Princess Siribhachudhabhorn (born 1982) (daughter of HRH Princess Chulabhorn and Air Vice Marshall Virayudh)
  • HRH Princess Adityadhornkitikhun (born 1984) (daughter of HRH Princess Chulabhorn and Air Vice Marshall Virayudh)
  • HRH Princess Srirasmi (born 1971) (wife of The Crown Prince)
  • HRH Princess Soamsavali (born 1957) (previous wife of The Crown Prince)


Mom Chao (His/Her Serene Highness Prince/Princess)
Mom Chao(m)/Mom Chao Ying(f) (?????????/?????????????, abbreviated in Thai as ?.?. or in English as M.C.) is the most junior class still considered royalty. This is normally when surnames first appear among royal lineages. In English this rank is translated as "His or Her Serene Highness." They are either:
  1. Children of a male Chao Fa and a commoner.
  2. Children of a male Phra Ong Chao.


Informally, they are styled Than Chai(m).../Than Ying(f)... (???????.../????????...).

There are a few dozen persons living as of 2008 who hold Mom Chao (most junior royal) rank, including:

HSH Prince Bhisatej RAJANI (born 1922) (son of HRH Prince Bidyalongkorn (a grandson of Vice-King Pinklao, who was a brother of King Rama IV) and younger brother of HSH Princess Vibhavadi RANGSIT
Vibhavadi Rangsit

Phra Chao Worawongse Ther Thai royal and noble titles#Phra Ong Chao Vibhavadi Rangsit was a Thailand royal well known for her fiction writing and her developmental work in rural Thailand....
 (wife of HSH Prince Piya Rangsit, a grandson of King Rama V)). HSH Princess Vibhavadi Rangsit was posthumously elevated to the rank of HRH (Phra Ong Chao) following her tragic death in service to the country)

HSH Princess Bhandu Savali YUGALA (born 1933) (daughter of HRH Prince Bhanubandhu YUGALA, a grandson of King Rama V) (sister-in-law to HM Queen Sirikit and mother to HRH Princess Soamsavali)

HSH Prince Bhuribandhu YUGALA (born 1934) (son of HRH Prince Bhanubandhu YUGALA, a grandson of King Rama V)

HSH Princess Rangsi Nobhadol YUGALA (born 1937) (daughter of HRH Prince Bhanubandhu YUGALA, a grandson of King Rama V)

HSH Prince Navabarnsa YUGALA (born 1978) (son of HRH Prince Bhanubandhu YUGALA, a grandson of King Rama V)

HSH Princess Bhanuma YUGALA (born 1981) (daughter of HRH Prince Bhanubandhu YUGALA, a grandson of King Rama V)

HSH Prince Mongolchalerm YUGALA (born 1936) (son of HRH Prince Chalermbala YUGALA, a grandson of King Rama V)

HSH Princess Sri Savangwongse YUGALA (born 1946) (daughter of HRH Prince Chalermbala YUGALA, a grandson of King Rama V)

HSH Prince Chalermsuk YUGALA (born 1950) (son of HRH Prince Chalermbala YUGALA, a grandson of King Rama V)

HSH Prince Dighambara YUGALA (born 1951) (son of HRH Prince Chalermbala YUGALA, a grandson of King Rama V)

HSH Princess Bhumari YUGALA (born 1939) (daughter of HRH Prince Anusara YUGALA, a grandson of King Rama V)

HSH Princess Malini Mongol YUGALA (born 1940) (daughter of HRH Prince Anusara YUGALA, a grandson of King Rama V)

HSH Princess Padamon Rangsi YUGALA (born 1941) (daughter of HRH Prince Anusara YUGALA, a grandson of King Rama V)

HSH Prince Chatrichalerm YUGALA or YUKOL (born 1942) (son of HRH Prince Anusara YUGALA, a grandson of King Rama V) (he is a movie director, e.g. The Legend of Suriyothai and King Naresuan the Great)

HSH Prince Chulcherm Yugala YUGALA (born 1947) (son of HRH Prince Anusara YUGALA, a grandson of King Rama V)

HSH Princess Nobhadol Chalerm Sri YUGALA (born 1953) (daughter of HRH Prince Anusara YUGALA, a grandson of King Rama V)

The 'titled commoners'


More distant royal progeny, starting from the children of male Mom Chao, are considered commoners. However, these commoners have titles (or a surname suffix) to indicate that their ancestry can be traced back to a king.

Mom Rajawongse
Mom Rajawongse (????????????, abbreviated in Thai as ?.?.?. and in English as M.R. and sometimes translated into English as "The Honorable") is the title assumed by children of male Mom Chao. The title is pronounced "Mom Rajawong". Informally, they may be styled as Khun Chai(m).../Khunying(f)... (??????.../???????...). (Khunying is also a formal title given to commoner married ladies who have been granted at least the Order of Chulachomklao, Fourth Class.) Holders of this title are occasionally erroneously referred to as princes/princesses in older English translated older documents; it is more common these days to use the correct title of "Mom Rajawongse".

Mom Luang
Mom Luang (?????????, abbreviated in Thai as ?.?. and sometimes in English as M.L. and sometimes translated into English as "The Honorable") are the last royal descendants still retaining a title. Mom Luang titles are conferred on children of male Mom Rajawongse. Colloquially, though incorrectly, they are sometimes addressed as "Mom"; the correct informal address is "Khun".

After Mom Luang
The children and subsequent descendants of male Mom Luang do not hold any title. However, they may append the word "Na Ayudhya"  (? ??????) to their surname, signifying a royal blood line.

Miscellaneous titles of royal descendants (obsolete)


Mom (royalty)
Mom has a rather ill-defined status among the hierarchy of the royal titles. A holder of this title may be either:
  • a person of Mom Rajawongse rank, who has been granted this "Mom" title by the king in recognition of his merit. Technically, this is a feudal lifetime title, equivalent to the title Phraya granted to commoners; it is thus written without a space. The title is granted together with an honorific name, and is used without a surname, for example: Mom Anuwatworapong (??????????????????), who was born as Mom Rajawongse Singhanad Pramoj (???????????? ??????? ??????).
  • a former prince whose title has been stripped off as a punishment. He would still be known as Mom [name].


Khun (courtesy title)
Khun is a courtesy title for children born to a noble mother who gave up her title to marry a man of lesser title. This is pronounced in lower tone, and not to be confused with Khun, pronounced in higher tone, which is a feudal title. In modern days, this word is used informally to courteously address virtually everybody, apart from those who actually hold a title of Mom Rajawongse or higher.

Prince's wife's title (unless otherwise elevated by the Sovereign)

Wives of the princes also have titles. Again, this depends on the titles of both sides.

Phra Chaya

Phra Chaya (???????) is a princess in her own right who is married to either Chao Fa or a Phra Ong Chao ranked royal prince (HRH Prince). She retains her own title. When referring to her as a wife of the prince, she may be called "Phra Chaya Nai [Husband's name]".

Chaya

Chaya is a princess in her own right who is married to a Mom Chao (HSH Prince). Again, she would retain her own title. When referring to her as a wife of the prince, she may be called "Chaya Nai [Husband's name]".

Mom (wife)

Mom in this context is a commoner married to a prince. She will use this title to prefix her name and add the word Na Ayudhya to her new surname, for example: Mom Srirasmi Mahidol Na Ayudhya (a wife of Chao Fa Maha Vajiralongkorn
Maha Vajiralongkorn

Maha Vajiralongkorn is the only son of Bhumibol Adulyadej, the King of Thailand, and Queen Sirikit. He is currently crown prince of Thailand, and the Heir apparent to the throne....
, whose surname is Mahidol).

After the birth of HRH Prince Dipangkorn Rasmijoti, Mom Srirasmi Mahidol Na Ayudhya was elevated by King Rama IX to "Phra Ong Chao" rank (i.e., Phra Chao Worawong Ther Phra Ong Chao Srirasmi Phraworachaya nai Somdej Phraborom Orasathiraj Siammakut Rajakumari (HRH Princess Srirasmi, the Royal Consort of His Royal Highness Crown Prince Maha Vajiralongkorn)).

Feudal lifetime titles (all obsolete except female titles "Than Phu Ying" and "Khun Ying" as discussed below)

Feudal titles were granted until just after the 1932 Revolution brought an end to absolute monarchy
Absolute monarchy

Absolute monarchy is a monarchy form of government where the king or queen has absolute power over all aspects of his/her subjects' lives. Although some religious authorities may be able to discourage the monarch from some acts and the sovereign is expected to act according to custom, in an absolute monarchy there is no constitution or legal...
, and for that matter, feudalism
Feudalism

Feudalism, a term first used in the early modern period , in its most classic sense refers to a Middle Ages European political system composed of a set of reciprocal law and military obligations among the warrior nobility, revolving around the three key concepts of lords, vassals, and fiefs....
 in Thailand. It is now obsolete, although on very rare occasions, the king may still grant an (honorary) feudal title to a royal. The latest title granted was "Kromma Luang Narathiwat Rajanakarin" (translated as "Princess of Narathiwat
Narathiwat Province

Narathiwat is one of the southern Provinces of Thailand of Thailand. Neighboring provinces are Yala Province and Pattani Province. To the south it borders the Malaysian state of Kelantan....
", literally "Viscountess of Narathiwat, Ruler of the Royal City") to the late Princess Galyani Vadhana
Galyani Vadhana

Princess Galyani Vadhana of Thailand, Princess of Naradhiwas was a Princess of Thailand and the elder sister of King Ananda Mahidol and King Bhumibol Adulyadej ....
, the King's sister (Somdet Phra Chao Phee Nang Ther Chao Fa Galyani Vadhana).

The full title granted consists of a prefix, which signifies the rank (??????????? - Bandasak), and an honorific name (????????? - Rachatinnanam), which can well be recycled. Taking the above example, the rank was "Luang" and the honorific name was "Narathiwat Rajanakarin". The appointee would use the full title in place of his names. However, as the honorific name can be repeated, when referring to a previous title holder, his former name may be written in a bracket to avoid confusion, for example: Phraya Kosathibodi (Lek) and Phraya Kosathibodi (Pan).

It is again a bit more complicated with the Chao Fa and Phra Ong Chao. If given a feudal title, they are said to "Song Krom" (?????? - lit.: "take department", but probably more semantically related to "take office"). The title is prefixed with the word "Krom" (which will be pronounced "Kromma" when forming part of the name), appended to (not replacing) the former princely title. For example, the full title of the King's sister is "Somdej Phra Chao Pheenang Ther Chao Fa Galyani Vadhana Kromma Luang Narathivat Rajanakarin. Nevertheless, it is the princely title which will be more frequently omitted when contracting the title e.g. Somdej Phra Chao Boromawong Ther Kromma Phraya Damrong Rajanubhab
Damrong Rajanubhab

Damrong Rajanubhab was the founder of the modern Thailand education system as well as the modern provincial administration. He was also a Autodidacticism historian, and one of the most influential intellectuals of his time....
 (born Phra Ong Chao Disuankumaan). There are 5 feudal titles for prince/princess

  1. Somdej Krom Phraya (from Rama VI) or Krom Somdej Phra (Rama IV - Rama V) (?????????????? ???? ????????????)
  2. Krom Phra
  3. Kromma Luang (???????)
  4. Kromma Khun Chao Fa starts from this title
  5. Kromma Muen (????????) Phra Ong Chao starts from this title


Since the time of King Chulalongkorn, the honorific titles given to the royalties normally incorporate a city name or its modified form, and the holders are known in English as the Prince/Princess of that city.

Feudal titles are not inheritable.

Feudal lifetime titles for male commoners (all obsolete)


These titles were given only to males and not inheritable much like a life peerage
Life peer

In the United Kingdom, life peers are appointed members of the Peerage whose titles may not be inherited. Nowadays life peerages, always of baronial rank, are created under the Life Peerages Act 1958 and entitle the holders to seats in the House of Lords, presuming they meet qualifications such as age and citizenship....
. European equivalents were also used on diplomatic missions.

Somdej Chao Phraya

Somdej Chao Phraya (???????????????) is the most senior among the ranks. It is awarded under extraordinary circumstances only to those with great achievements. This title is equivalent to that of a prince or Grand Duke
Grand Duke

The title grand duke is used in Western Europe and particularly in Germanic languages countries for provincial sovereigns. Grand duke is of a protocolary rank below Monarch but higher than a sovereign duke....
.

There have only been 4 persons in Siam's history to be elevated to this title. The first was granted by King Taksin of Thonburi
Taksin

Somdet Phrachao Taksin Maharaj or Somdet Phrachao Krung Thonburi ; ; Teochew: D?nchao; was the first and only monarch of Thonburi kingdom....
 to Chao Phraya Chakri who later become King Rama I of Bangkok; two were granted by King Rama IV; and the last was granted by King Rama V.

Chao Phraya

Chao Phraya (?????????) is the most senior rank commonly granted. It is normally bestowed upon commners who served as Ministers of State. Holders of this title are informally addressed and referred to as "Chao Khun" (???????) (2nd person: Chao Khun; 3rd person: Chao Khun + [honorific name]). This title is equivalent to Duke
Duke

A duke is a member of the nobility, historically of highest rank below the monarch, and historically controlling a duchy or a dukedom. The title comes from the Latin language Dux Bellorum, which had the sense of "military commander" and was employed by both the Germanic peoples themselves and by the Ancient Rome authors covering them to r...
.

Phraya

Phraya is next in term of seniority. Similar to Chao Phraya, holders of this title are also informally addressed and referred to as "Chao Khun" (???????). This title is equivalent to Marquess
Marquess

A marquess or marquis is a nobleman of hereditary rank in various European monarchies and some of their colonies. The term is also used to render equivalent oriental styles as in imperial China and Japan....
 or Marquis.

Phra and Jamuen (or Phranai)

Phra is further down the line. Holders of this title are informally addressed and referred to as "Khun Phra" (2nd person: Khun Phra; 3rd person: Khun Phra + [honorific name]). Jamuen (????? ???? ??????) is a senior title equivalent to Phra, given only to the Head of the king's servants (????????). The European equivalent to this title is Count
Count

A count is a nobleman in European countries; The word count comes from French language comte, itself from Latin comes?in its Accusative case comitem?meaning "companion", and later "companion of the emperor, delegate of the emperor"....
 or Earl.

Luang

Luang. Still further down the line, holders of this title are informally addressed and referred to as "Khun Luang" (???????) (2nd person: Khun Luang; 3rd person: Khun Luang + [honorific name]). Equivalent to viscount
Viscount

A 'viscount' is a member of the European nobility whose count title ranks usually, as in the British peerage, above a baron, below an earl or a count ....
.

Khun

Khun. This is pronounced with higher tone (as oppose to Khun in lower tone). Informally, they are addressed as "Than Khun" (???????). The last living holder of the title was believed to be Pol Maj-Gen Khun Phantharak Rajadej (Butr Phantharak) who died in 2006, age 103. Equivalent to Baron
Baron

Baron is a specific title of nobility. The word baron comes from Old French baron, itself from Old High German and latin baro meaning " man, warrior"; it merged with cognate Old English language beorn meaning "nobleman."...
.

Muen

Muen is one of the lower ranks, usually held by relatively junior officers.

Pan

Pan, a yet lower rank, and not considered very noble. This title is held by junior officers, especially those in rural areas.

Nai

Nai, one step up from being a Prai (???? -- plain commoner). This is the most junior among the ranks, and is not normally considered noble. Nowadays used as an equivalent for Mister
Mr.

Mr. or Mr is an English honorific used for a man too old to be addressed as Master , under the rank of knighthood, and, supposedly, though not really in practice, above some undefined level of social status ....
.

Feudal lifetime titles for female commoners (still in use)


The title for women who are commoners used to be Thao .

For example, Thao Thepkrasattri
Chan and Mook

Thao Thep Kasattri and Thao Sri Sunthon or Chan and Mook were two sisters who lived in Phuket, Siam in the late eighteenth century. According to the popular belief, they repelled a five-week invasion of Phuket by Burma in 1785 by dressing up as male soldiers and rallying the Siamese troops....
, Thao Seesunthon
Chan and Mook

Thao Thep Kasattri and Thao Sri Sunthon or Chan and Mook were two sisters who lived in Phuket, Siam in the late eighteenth century. According to the popular belief, they repelled a five-week invasion of Phuket by Burma in 1785 by dressing up as male soldiers and rallying the Siamese troops....
, and Thao Suranaree
Thao Suranaree

Thao Suranaree or Khunying Mo was the wife of the deputy governor of Nakhon Ratchasima, Thailand at the time of King Anouvong's rebellion of 1826....
, are famous heroines in Thai history. This title is no longer in use.

King Rama V
Chulalongkorn

Phrabat Somdet Phra Poramintramaha Chulalongkorn, Phra Chulachomklao Chaoyuhua was the fifth monarch of the Chakri dynasty. He was known to the Siamese of his time as Phra Buddhachao Luang ....
 created the titles currently in use for women. The present King (Bhumibhol, King Rama IX), usually, grants the titles for women on the his coronation day (5 May) every year. These are the only titles for commoners that have survived in modern day usage, since the titles for men are no longer in use.

Than Phuying

Than Phuying (???????????) is the highest title for a non-royal woman and is equivalent to the British title of Dame
Dame (title)

Dame is the female equivalent of address to Sir for a United Kingdom knighthood. In the UK honours system, this can be the title of a woman who has been made a Dame Commander or Dame Grand Cross of the Order of the Bath, Order of St Michael and St George, Royal Victorian Order, or Order of the British Empire....
.

Khun Ying

Khun Ying (???????) is a title for married woman lower than Than Phuying. An unmarried woman is styled Khun. It is equivalent to the British title of Lady
Lady

A lady is the female equivalent of a lord, the counterpart of a gentleman, or any adult woman, though this usage is constrained....
.