Their most prominent ruler was
Ajwad ibn Zamil, who died in 1496. He was described by his contemporaries as having been "of tribe of
Banu Uqayl origin." Ajwad's elder brother had earlier established the dynasty in the early 15th century by deposing and killing the last
Jarwanid ruler in
Qatif. At their height, the Jabrids controlled the entire Arabian coast on the Persian Gulf, including the islands of Bahrain, and regularly led expeditions into central Arabia and
Oman. The Jabrids had a major role in reviving the
Ibadhi Imamate in opposition to the
Nabhanids, They appointed Omar Bin Khattab Al Kharusi in as an Imam in 1487, in extange for him paying an annual tribute to the Jabrid treasury and Imam Muhammad bin Ismail in 1500. However, Jabrid rule was limited in Oman as the
interior was contested by the Jabrids in one part, the Imamate in another and the Nabhanids in another part, whilst most of the Omani coast overlooking the
Gulf of Oman remained under the rule of
Hormuz. Jabrid rule remained in effect in some regions till the arrival of the One contemporary scholar described Ajwad ibn Zamil as "the king of al-Ahsa and Qatif and the leader of the people of Najd." Following his death, his kingdom was divided among some of his descendants, with
Migrin ibn Zamil (possibly his grandson) inheriting
al-Hasa,
Qatif, and
Bahrain. Migrin fell in battle in
Bahrain in a failed attempt to repel an invasion of Bahrain by the
Portuguese in 1521. ==Culture and literature ==