THE FULL ARTICLE — from the International Standard Bible Encyclopedia

The International Standard Bible Encyclopedia (1915), general editor James Orr — public domain, printed whole.

ad'-o (Codex Alexandrinus, Addo; Codex Vaticanus, Eddein) = Iddo (Ezr 5:1; 6:14): The father (Zec 1:1,7 grandfather) of Zechariah the prophet (1 Esdras 6:1).