JADDUA. 1. One of those who sealed the covenant ( Nehemiah 10:21 ). 2 . A high priest ( Nehemiah 12:11; Nehemiah 12:22 ). He is doubtless the Jaddua who is named by Josephus in connexion with Alexander the Great (Jos. [Note: Josephus.] Ant . XI. viii. 5, cf. vii. 2, viii. 7).