or rustumids, an Ibāḍī dynasty, of Persian origin, which reigned from Tāhart (in what is now Algeria) 161-296/778-909. The birth of the Ibāḍī principality of Tāhart is bound up with the great Berber rising begun by Maysara (called, as a tribute from his enemies, al-Ḥaḳīr “The Vile”) in 122/740. As a result of this rising, the greater part of the Mag̲h̲rib fell away definitively from the control of the caliphate in the East, with the exception of the principality of Ḳayrawān (Kairouan), which only achieved virtual independence with the coming of the Ag̲h̲labids [ q.v.] in 184/800. The Ibā…