عبد المؤمن بن علي
The Almohad hagiographer al-Baydhaq claims that Ibn Tumart had already designated Abd al-Mu'min as his successor back in Bejaia. But it seems more probable (although passed over in the chronicles) that there was an intense power struggle for succession in the aftermath of Ibn Tumart's death. With half the Council of Ten killed at al-Buhayra, Abd al-Mu'min laid claim as the "successor" of the Ibn Tumart (the term "caliph", as "successor" of the Mahdi emerged only later, in conscious imitation of the term's original use for the "successors" of the Muhammad.) Abd al-Mu'min's claim was challenged by Ibn Malwiya (another survivor of the Ten) as well as by the Ahl al-Dar (Ibn Tumart's brothers).