NET
16 In the fifth year of the reign of Israel’s King Joram, son of Ahab, Jehoshaphat’s son Jehoram became king over Judah.
Darby
16 And in the fifth year of Joram the son of Ahab, king of Israel, Jehoshaphat being then king of Judah, Jehoram the son of Jehoshaphat, king of Judah, began to reign.
KJV
16 And in the fifth year of Joram the son of Ahab king of Israel, Jehoshaphat [being] then king of Judah, Jehoram the son of Jehoshaphat king of Judah began to reign.