Abū Jaʿfar b. Shīrzād, Muḥammad b. Yaḥyā b. Zakariyyā b. Shīrzād (d. after 335/946), secretary, vizier and amīr al-umarāʾ (supreme commander) of Baghdad. Little is known about his early life or how he entered the court of the ʿAbbāsid caliph. In his description of the events that took place in 315/927, Abū ʿAlī Miskawayh (1/163–164) mentions him as secretary and overseer of the affairs of Hārūn b. Gharīb al-Khāl, a companion of the caliph, and says that in that year Hārūn brought charges against him with the inte…