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.
Ibn Kathir Ismail ibn Kathir (Arabic: ابن كثير‎ ‎ , born c. 1300, died 1373) was a highly influential Sunni scholar of the Shafi'i school during the Mamluk rule of Syria, an expert on tafsir (Quranic exegesis) and faqīh (jurisprudence) as well as a historian. Al-Hafiz Ibn Hajar Al-Asqalani said about him, “Ibn Kathir worked on the subject of the Hadith in the texts (متون) and chains of narrators (رجال). He had a good memory, his books became popular during his lifetime, and people benefited from them after his death.”