Son of Rehob, Syrian king of Zobah. He was defeated by David with great loss, and driven across the Euphrates. David took much spoil and the shields of gold he dedicated to the Lord. Hadadezer was also again totally defeated by David (2 Sam. 8:3-12; 1 Kings 11:23). Called HADAREZER (2 Sam. 10:16,19; 1 Chron. 18:3-10; 1 Chron. 19:16-19).