Johoaddan is a biblical figure mentioned in the Old Testament, specifically in 2 Kings 21:1 and 2 Chronicles 33:1, as the mother of King Amon of Judah. She is noted for her influence during Amon's reign, which was marked by idolatry and a departure from the worship of Yahweh. Johoaddan's role, while not extensively detailed, highlights the importance of royal women in the biblical narrative. Her name may also suggest a connection to the worship practices of her time.