| Abu Hafs Umar bin Yahya | |
|---|---|
| Caliph of the Hafsid Sultanate | |
| Reign | 1284–1295 |
| Predecessor | Ibn Abi Umara |
| Successor | Abu Asida Muhammad II |
| Born | unknown |
| Died | 1295 Hafsid Sultanate |
| Dynasty | Hafsids |
| Father | Abu Zakariya Yahya |
| Mother | Zabya, a slave |
| Religion | Islam |
Abu Hafs Umar bin Yahya (Arabic: أبو حفص عمر) (also known as Al-Mustansir II) was the Hafsid caliph of Ifriqiya (1284–1295).[1][2]
After restoring Hafsid rule interrupted by the usurper Ibn Abi Umara (1283–1284), Abu Hafs Umar sought to rebuild the state in the face of invasions and challenges to his authority. He was however unable to prevent the division of Hafsid territories. During the period when the Hafsids had been driven out of Tunis by Ibn Abi Umara, Zakariyya, a nephew of Abu Hafs Umar I, conquered Bejaïa with the support of local tribes and later also gained control of Constantine. In 1285 Zakariyya also attacked Tunis and Tripoli. Although this attack was neutralized by an alliance between Abu Hafs Umar I and the Zayyanids of Tlemcen, Constantine and Bejaïa became independent of the rule of from Tunis. Abu Hafs Umar I died in 1295.