Rezin (rç'zin), stable, firm. 1. King of Damascus: allied himself with Pekah and defeated Ahaz, but was himself defeated by Tiglath-pileser II., his capital destroyed and his people carried away into captivity. 2 Kings 15:37, 2 Kings 1:16-9, Isaiah 1:7-8, Isaiah 8:6, Isaiah 9:11.. One whose descendants returned with Zerubbabel. Ezra 2:48, Nehemiah 7:50.