Mazhir ben Abraham (Hebrew: מזהיר בן אברהם, died after 1191), known as Rabbi Mazhir the Third (Hebrew: רבינו מזהיר השלישי) was a senior member of the remnant of the Palestinian Gaonate in Damascus, a cantor, and a liturgical poet.
[1][2] When Benjamin of Tudela visited Damascus in around 1168 he does not mention Mazhir, who had not yet assumed his position as the Third.
[3][4] A letter from the Iraqi Gaon Samuel ben Ali from 1191 mentions "the honorable elderly Mazhir the Third".
[6][7] Mann disagreed and read the letter as saying that Mazhir was serving as the Third under a nephew of his, Abraham, a son of his brother Ezra.
[10][11] Mazhir was a paytan, a liturgical poet, and a number of his compositions have survived, primarily in mahzorim of the Old Aleppo Rite.