Ubaydallah ibn Abdallah ibn Tahir was the last major Tahirid to hold high office in what dynasty?
Tahirid dynasty The Tahirid dynasty (Persian: طاهریان‎ ‎ , "Tâhereyân") was a dynasty, of Persian dihqan origin, that governed the Abbasid province of Khorasan from 821 to 873 and the city of Baghdad from 820 until 891. The dynasty was founded by Tahir ibn Husayn, a leading general in the service of the Abbasid caliph al-Ma'mun. Their capital in Khorasan was initially located at Merv but was later moved to Nishapur. The Tahirids enjoyed a high degree of autonomy in their governance of Khorasan, but they remained subject to the Abbasid caliphate and were not independent rulers.
Muhammad ibn Tughj al-Ikhshid Abū Bakr Muḥammad ibn Ṭughj ibn Juff ibn Yiltakīn ibn Fūrān ibn Fūrī ibn Khāqān (8 February 882 – 24 July 946), better known by the title al-Ikhshīd (Arabic: الإخشيد‎ ‎ ) after 939, was an Abbasid commander and governor who became the autonomous ruler of Egypt and parts of Syria (or Levant) from 935 until his death in 946. He was the founder of the Sunni Ikhshidid dynasty, which ruled the region until the Fatimid conquest of 969.