2 Kings 1:17
So he died according to the word of the LORD that Elijah had spoken. Jehoram became king in his place in the second year of Jehoram the son of Jehoshaphat, king of Judah, because Ahaziah had no son.
2 Kings 3:1
In the eighteenth year of Jehoshaphat king of Judah, Jehoram the son of Ahab became king over Israel in Samaria, and he reigned twelve years.
1 Kings 22:51
Ahaziah the son of Ahab began to reign over Israel in Samaria in the seventeenth year of Jehoshaphat king of Judah, and he reigned two years over Israel.
2 Kings 8:16-17
In the fifth year of Joram the son of Ahab, king of Israel, when Jehoshaphat was king of Judah, Jehoram the son of Jehoshaphat, king of Judah, began to reign.