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.

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.

[6] The Jabrid kingdom collapsed soon afterwards on the mainland, after an invasion of al-Hasa by Rashid Ibn Mughamis, the chief of Muntafiq Bedouins.

Some believe they left to Iraq, while others believe they are identical with the Jubur section of the Banu Uqayl confederation, who took control of the region before the Jabrids by around 200 years.