Jaddua was the name of a leader who sealed the covenant in Nehemiah’s time and of a later high priest. The name means “known.” The high priest Jaddua was a son of Jonathan or Johanan and the last high priest mentioned in the Old Testament.
The first Jaddua joined other leaders in affirming the covenant and their submission to the law. The second appears in the priestly genealogy as the final high priest named in the Old Testament.
The later Jaddua is placed during the reign of Darius the Persian, identified in the supplied material as Darius III, who was overthrown by Alexander the Great. The supplied material also notes that the site and period are connected with Josephus’s account.