ʿAbd Allāh b. ʿAlī, Abū Muḥammad (d. 147/764), one of the well-known figures of the ʿAbbāsid dynasty and governor of Greater Syria (al-Shām) during the reign of Abū al-ʿAbbās al-Saffāḥ (q.v.), and who laid claim to the caliphate when the ʿAbbāsid al-Manṣūr was caliph.

He was a grandson of ʿAbd Allāh b. al-ʿAbbās, and as his father had long been living in al-Ḥumayma, a village near the port of al-ʿAqaba (Yāqūt, 2/342; Akhbār al-dawla, 108, 154), he was probably born there. Considering his age at the time of his death (al-Balādhurī, Ansāb, 4/154; al-Ṭabarī, 8/9), he must have been born …