Al-Ashraf Umar II
Al-Malik al-Ashraf Umar II (c. 1242–1296) was the third Rasulid sultan of Yemen and a scholar of mathematics, astronomy, agriculture and medicine. The eldest son of al-Muzaffar Yusuf I, he raided Hajjah in 1266 and governed al-Mahjam and Sanaa.
He succeeded his father in 1295 but reigned for only 21 months before his death in 1296, leaving the throne to his younger brother al-Mu'ayyad Da'ud.