Abū Ṭāhir Abraham ben Mazhir (Hebrew: אברהם בן מזהיר, Arabic: ابو طاهر, died c. 1160) was head of the remnant of the Palestinian Gaonate in Damascus in the first half of the 12th century.
His father Mazhir is styled in a letter from the Cairo Genizah as "Yesod haYeshiva", "the foundation of the Yeshiva".
[3] Amir Ashur has argued that Masliah's control extended over Damascus and Abraham was not an opposing Gaon.
Judah al-Harizi, during his stay in Aleppo in circa 1215, met several of Abraham's descendants and wrote extremely highly of them.
[13][14] Abraham's second son Sar Shalom appears to have succeeded Ezra, and Mazhir outlived his two brothers and occupied a high position in the Yeshiva.