The Ziyadid dynasty was a Muslim

Muslim

A Muslim, also spelled Moslem, is an adherent of Islam, a monotheistic, Abrahamic religion based on the Quran, which Muslims consider the verbatim word of God as revealed to prophet Muhammad. "Muslim" is the Arabic term for "submitter" .Muslims believe that God is one and incomparable...

 dynasty that ruled western Yemen

Yemen

The Republic of Yemen , commonly known as Yemen , is a country located in the Middle East, occupying the southwestern to southern end of the Arabian Peninsula. It is bordered by Saudi Arabia to the north, the Red Sea to the west, and Oman to the east....

 from 819 until 1018 from the capital city of Zabid

Zabid

Zabid is a town with an urban population of around 23,000 persons on Yemen's western coastal plain. The town, named after Wadi Zabid, the wadi to its south, is one of the oldest towns in Yemen...

. The dynasty was formed by the Abbasid

Abbasid

The Abbasid Caliphate or, more simply, the Abbasids , was the third of the Islamic caliphates. It was ruled by the Abbasid dynasty of caliphs, who built their capital in Baghdad after overthrowing the Umayyad caliphate from all but the al-Andalus region....

 Caliph, al-Ma'mun

Al-Ma'mun

Abū Jaʿfar Abdullāh al-Māʾmūn ibn Harūn was an Abbasid caliph who reigned from 813 until his death in 833...

, to manage 'Alid

Alid

The Alid dynasties descended from Ali ibn Abi Talib, son-in-law of the Islamic prophet Muhammad. Shia Muslims consider him the First Imam appointed by Muhammad and the first rightful caliph. The Alid are followers of Ali ibn Abi Talib and his sons....

 Shi'a

Shi'a Islam

Shia Islam is the second largest denomination of Islam. The followers of Shia Islam are called Shi'ites or Shias. "Shia" is the short form of the historic phrase Shīʻatu ʻAlī , meaning "followers of Ali", "faction of Ali", or "party of Ali".Like other schools of thought in Islam, Shia Islam is...

 influence. The first ruler was Muhammad ibn Ziyad, the Ziyad family quickly declared independence.

In 1018, the city of Zabid

Zabid

Zabid is a town with an urban population of around 23,000 persons on Yemen's western coastal plain. The town, named after Wadi Zabid, the wadi to its south, is one of the oldest towns in Yemen...

 fell to the Najahid dynasty under Najah after the Ziyadi ruler was murdered.