A descendant of the second Rashidun caliph Umar ibn al-Khattab, Umar was appointed as governor shortly after the death of the caliph al-Amin in 813. He remained in office for less than a year, during which time he carried out instructions to arrest his predecessor Yazid ibn Jarir al-Qasri, and was dismissed in mid-814.
Yazid ibn Jarir al-Qasri
| Abbasid governor of the Yemen
Ishaq ibn Musa ibn Isa al-Hashimi