For the Amora sage, also an Exilarch, see: Mar Ukva.
For the Amora sage of the 3d generation, also an Exilarch, see: Mar 'Ukban III (exilarch) [also known as "Ukban ben Nehemiah" or "Nathan de-Zuzita"].

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 'Uḳba, entered into conversation with him, and asked him to express a wish, whereupon the gaon requested that he might be reinstated. The calif granted this wish, and Mar 'Uḳba soon returned to Baghdad as exilarch. Kohen Ẓedeḳ and his friends, however, again succeeded in securing his deposition and banishment from the country, whereupon he went to Africa, and was received with high honors at Kairwan as a descendant of the royal house. A sort of throne (bimah) was built for him in the synagogue, near the Ark of the Law, and he was always the third to read the parashah, the scroll of the Law being brought to him in his seat.