عبد الله بن ياسين
Abdallah ibn Yasin was a Gazzula Berber, and probably a convert rather than a born Muslim. His name can be read as "son of Ya Sin" (the title of the 36th Sura of the Qur'an), suggesting he had obliterated his family past and was "re-born" of the Holy Book. Ibn Yasin certainly had the ardor of a puritan zealot; his creed was mainly characterized by a rigid formalism and a strict adherence to the dictates of the Qur'an, and the Orthodox tradition. (Chroniclers such as al-Bakri allege Ibn Yasin's learning was superficial.) Ibn Yasin's initial meetings with the Gudala people went poorly. As he had more ardor than depth, Ibn Yasin's arguments were disputed by his audience. He responded to questioning with charges of apostasy and handed out harsh punishments for the slightest deviations. The Gudala soon had enough and expelled him almost immediately after the death of his protector, Yahya ibn Ibrahim, sometime in the 1040s.