Ahaziah [was] twenty-two years old when he became king, and he reigned one year in Jerusalem. The name of his mother [was] Athaliah daughter of Omri, king of Israel.

His mother was named Athaliah. She was the granddaughter of Omri, king of Israel. Ahaziah lived his life following the example of Ahab's household, practicing what the LORD considered to be evil, just like the household of Ahab, because he was a son-in-law to Ahab's household.