The Dillon Baronetcy of Lismullen, in County Donegal

County Donegal

County Donegal is a county in Ireland. It is part of the Border Region and is also located in the province of Ulster. It is named after the town of Donegal. Donegal County Council is the local authority for the county...

 was created in Baronetage of the United Kingdom in 1801. It became extinct with the death of the 8th Baronet in 1982.

The baronets also held the title of Baron Dillon, of the Holy Roman Empire

Holy Roman Empire

The Holy Roman Empire was a realm that existed from 962 to 1806 in Central Europe.It was ruled by the Holy Roman Emperor. Its character changed during the Middle Ages and the Early Modern period, when the power of the emperor gradually weakened in favour of the princes...

, which was granted by Imperial Letters Patent of the Emperor Joseph II

Joseph II, Holy Roman Emperor

Joseph II was Holy Roman Emperor from 1765 to 1790 and ruler of the Habsburg lands from 1780 to 1790. He was the eldest son of Empress Maria Theresa and her husband, Francis I...

 dated 4 July 1783. The ancestral motto is Whilst I breathe I hope. Royal License to use this title was granted by King George III

George III of the United Kingdom

George III was King of Great Britain and King of Ireland from 25 October 1760 until the union of these two countries on 1 January 1801, after which he was King of the United Kingdom of Great Britain and Ireland until his death...

 on 22 February 1784.

Dillon Baronets (1801)

• Sir John Talbot Dillon, 1st Baronet (1739–1805)
• Sir Charles Drake Dillon, 2nd Baronet (died 1840)
• Sir Arthur Richard Dillon, 3rd Baronet (died 1845)
• Sir William Dillon, 4th Baronet (1774–1851)
• Sir Arthur Henry Dillon, 5th Baronet (1828–1852)
• Sir John Dillon, 6th Baronet (1806–1875)
• Sir John Fox Dillon, 7th Baronet (1843–1925)
• Sir Robert Dillon, 8th Baronet (1914–1982); brother of Michael Dillon
  Michael Dillon
  Laurence Michael Dillon was a British physician and the first female-to-male transsexual to undergo phalloplasty. His brother, Sir Robert Dillon, was the eighth Baronet of Lismullen in Ireland....
  
   (née Laura Dillon).

In 1958 Debrett's Peerage listed Michael Dillon

Michael Dillon

Laurence Michael Dillon was a British physician and the first female-to-male transsexual to undergo phalloplasty. His brother, Sir Robert Dillon, was the eighth Baronet of Lismullen in Ireland....

, the world's first female-to-male transsexual to undergo sex reassignment surgery

Sex reassignment surgery

Sex reassignment surgery is a term for the surgical procedures by which a person's physical appearance and function of their existing sexual characteristics are altered to resemble...

, as heir to his brother's baronetcy, while Burke's Peerage

Burke's Peerage

Burke's Peerage publishes authoritative, in-depth historical guides to the royal and titled families of the United Kingdom, such as Burke's Peerage, Baronetage & Knightage, and of many other countries. Founded in 1826 by British genealogist John Burke Esq., and continued by his son, Sir John...

mentioned only a sister, Laura Maude. The editor of Debrett's told Time Magazine that Dillon was unquestionably next in line for the baronetcy: "I have always been of the opinion that a person has all rights and privileges of the sex that is, at a given moment, recognized."