Mar Ukba, an exilarch at Baghdad in the first half of the tenth century; the second exilarch to die in banishment. When Kohen Ẓedeḳ II was appointed gaon of Pumbedita he became involved in a controversy with Mar 'Uḳba over the revenues from Khorasan; and the calif Al-Muḳtadir (908-932) was induced by Ẓedeḳ's friends to depose Mar 'Uḳba. Soon afterward (917) the latter left Baghdad for Karmisin (Kermanshah), but when the young calif went for the summer to his palace at Safran, Mar 'Uḳba devised a scheme to win the royal favor by meeting Al-Muḳtadir's secretary daily in his gardens and greeting him with the recitation of beautiful verses. These pleased the calif's secretary so much that he wrote them down and showed them to his master, who in his turn was so delighted that he sent for Mar 'U