“The inhabitants of Jerusalem made the youngest son of King Jehoram Ahaziah king as his successor. The troops who came with the Arabs to the camp had killed all the older sons. So King Ahaziah son of King Jehoram reigned as king of Judah. King Ahaziah was forty-two years old when he began to reign. He reigned one year in Jerusalem. His mother’s name was Athaliah, a granddaughter of King Omri of Israel. He also walked in the ways of the house of King Ahab, because his mother was his counselor in doing wickedly. He did what was evil in the sight of Yahweh, as the house of King Ahab had done. After the death of his father they were his counselors, to his ruin.”
Once again, this is loosely based on 2 Kings, chapter 8. King Ahaziah, the son of King Jehoram of Judah, was the nephew of King Jehoram of Israel. Thus he was the great grandson of King Omri of Israel, since his mother was Athaliah, the sister of King Jehoram of Israel and daughter of King Ahab of Israel. This King Ahaziah of Judah had the same name as King Ahaziah of Israel, who was his uncle. He may have been named after him. They both had short reigns as kings. Therefore, he walked in the evil ways of the house of King Ahab. However, there are 2 problems with King Ahaziah besides his short reign of 1 year. First, he was called Jehoahaz in the preceding chapter as the only son left after the killing of all the sons of Jehoram. The reference is to the same person. The 2nd problem is his age. Here he is 42 years old, which makes no sense since his father died at the age of 40. In 2 Kings, he was 22, which means that he probably was an older son of King Jehoram since he was born when King Jehoram was 18. In any case, he is young and wicked. He following the advice of the Israelite family of King Ahab since his mother had some influence on him. This would seem to indicate the younger age.