Ubaydallah ibn Abdallah ibn Tahir was the last major Tahirid to hold high office in what dynasty?
Ubaydallah ibn Abdallah ibn Tahir Abu Ahmad Ubaydallah ibn Abdallah ibn Tahir (Arabic: أبو أحمد عبيد الله بن عبد الله بن طاهر‎ ‎ , ca. 838 – May 913) was a ninth century Tahirid official and military officer. He was the last major Tahirid to hold high office, having served as the governor of Baghdad at various points between 867 and 891.
Bahdal ibn Unayf al-Kalbi Bahdal ibn Unayf ibn Walja ibn Qunafa al-Kalbi (died ca. 650s) was the chieftain of the Banu Kalb during early Muslim rule in Syria until his death in the mid-650s. A Christian like most of his tribesmen at the time, Bahdal secured a prominent role for his family and the Banu Kalb by marrying off his daughter Maysun to the future caliph Mu'awiyah I (r. 661–680), while the latter was governor of Syria (639–661). Maysun would give birth to Mu'awiyah's son and successor, Yazid I (r. 680–683). Though Bahdal died before 657, his forging of ties with the Umayyads secured his descendants and tribesmen the most prominent positions in the Umayyad court and military, so much so that partisans of the Umayyads became known as ""Baḥdaliyya"". Bahdal's grandchildren led the Yaman faction in the wars with Qays, a rival tribal confederation.