In 1253, the Bahrani dynasty of the Usfurids of Banu Uqayl - named after its founder, Usfur ibn Rashid - gained control over eastern Arabia, including the islands of Bahrain. The late Middle Ages were a time of chronic instability with local disputes allowing various Persian-based Arab Kingdoms based in Qais, Qishm and Hormuz to involve themselves in Bahrain's affairs. In 1330, the islands became tributary to the rulers of Hormuz.