Jaddua (jad-dû'a or jâd'du-ah), known. 1. Son and successor in the high priesthood of Jonathan or Johanan, and last of the high priests mentioned in the Old Testament. R. V. Joiada. Nehemiah 12:11; Nehemiah 12:22. b.c. 406-332. 2. One of the chief of the people who sealed the covenant with Nehemiah. Nehemiah 10:21.