ʿAbd Allāh ibn ʿUmar ibn ʿAbd al-ʿAzīz (Arabic: عبد الله بن عمر بن عبد العزيز; died 750) was an Umayyad prince, the son of caliph Umar II (r. 717–720), and briefly governor of Iraq under Yazid III in 744–745.
[1] Following the death of Yazid III, Marwan II (r. 744–750), who seized the throne, appointed a supporter of his own, the Qaysi al-Nadr ibn Sa'id al-Harashi, as governor of Iraq, but Abd Allah ibn Umar retained the loyalty of the Kalbi majority of the Syrian garrison of Iraq.
[2] The conflict between Ibn Umar and al-Nadr was abruptly ended by the Kharijite revolt which had begun among the Banu Rabi'ah tribes in Upper Mesopotamia.
[3] Nadr fled back to Syria to join Marwan, but Ibn Umar and his followers withdrew to Wasit.
[3] After Dahhak was killed by Marwan's army at Kafartuta, Yazid ibn Hubayra was sent to establish Umayyad control over Iraq.