Jamieson, Fausset and Brown on Nehemiah 12:11

11. Jaddua--It is an opinion entertained by many commentators that this person was the high priest whose dignified appearance, solemn manner, and splendid costume overawed and interested so strongly the proud mind of Alexander the Great; and if he were not this person (as some object that this Jaddua was not in office till a considerable period after the death of Nehemiah), it might probably be his father, called by the same name.