Jehoram was first made king or viceroy by his father divers years before this time, to wit, at his expedition to Ramoth-gilead, as was noted before; which dominion of his ended at his father's return. But now Jehoshaphat, being not far from his death, and having divers sons, and fearing some competition and dissension among them, makes Jehoram king the second time, as David did Solomon upon the like occasion, 1 Chronicles 29:22, which is the thing here related. But of this See Poole on "2 Kings 1:17"; See Poole on "2 Kings 3:1".
Related Commentaries of 2 Kings 8:16
2 Kings 8:16
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.