There are three Azubahs mentioned in the Bible:

• One is a wife of Caleb the son of Hezron (1 Chronicles 2, 18). The text seems to indicate that Azubah has sons, but they aren’t mentioned and she dies in the next verse. It may very well be that Caleb’s wives Azubah and Jerioth are mentioned as a single marital unit, from which sons come, but that Azubah is mentioned as the one who dies childless. Caleb subsequently marries Ephrath and she bears him Hur.
• The second Azubah is the daughter of Shilhi and the mother of Jehoshaphat, king of Judah (1 Kings 22, 42).
• The third time the name Azubah occurs is in a small array of nicknames that the prophet Isaiah assigns to Zion and Jerusalem (Isaiah 62, 4).