al-Muzaffar Yusuf (b. 'Umar)

Rasulid

626-842 AH

The eponymous founder of the dynasty, Rasul, was a Turkoman official in 'Abbasid service in the late 12th century. His grandson, al-Mansur 'Umar I, was first an officer under the Ayyubids, but became DE faco ruler of most of the Yemen after the death of the last effective Ayyubid in 626/1299 and DE jure ruler seven or eight years later.