"Kaicili" (prince) Baab was the oldest, or one of the oldest, sons of Sultan Hairun (r. 1535-1570) by his consort Boki Tanjung, the daughter of Sultan Alauddin I of Bacan.Little is known about his childhood, except that his father fostered his religious training; he was taught to "preach to the people", meaning that he received a thorough knowledge of the Qur'an.