Yahya Ibn Ibrahim (Arabic: يحيى بن إبراهيم الجدالي) (c. 1048)[1] was a leader of the Godala tribe in the Adrar plateau modern day Mauritania. Yahya Ibn Ibrahim's primary significance was in his involvement with Abdallah ibn Yasin, a Berber Muslim theologian with whom he founded the Almoravid movement. Yahya Ibn Ibrahim is the first Almoravid emir.[2][3][4] His successor Yahya ibn Umar was his nephew.[5]