Abdallah ibn Yasin
Ibn Umar's succession was endorsed by Abdallah ibn Yasin, a Maliki jurist and fiery puritan preacher, who had been staying as a guest of the Gudala, and it is possibly on account of this that Ibn Yasin was expelled by the Gudala. Probably sensing the useful organizing power of Ibn Yasin's pious fervor, Yahya ibn Umar invited him to stay among the Lamtuna. Yahya attached himself closely to Ibn Yasin, and a productive relationship was forged between the two men.