A'din (Heb. Adin', עָדַין, effeminate, as in Isa 47:8; Sept. Α᾿δίν, Α᾿δδίν, ᾿Ηδίν, ᾿Ηδείν), the head of one of the Israelitish families, of which a large number (454, according to Ezr 2:15, but 655, according to Ne 7:20 — the discrepancy being occasioned by an error in the hundreds, and the including or excluding of himself) returned from Babylon with Zerubbabel (B.C. 536) and fifty more (with Ebed the son of Jonathan) under Ezra (B.C. 459, Ezr 8:6). He appears to have been the same with one of those who subscribed the religious covenant with Nehemiah (Ne 10:16, B.C. cir. 410). His name occurs in the parallel passages of the Apocrypha (Α᾿δινού, 1 Esdras 5:14; Α᾿δίν, 1 Esdras 8:32).