51 Ahaziah the son of Ahab began to reign over Israel in Samaria the seventeenth year of Jehoshaphat king of Judah, and reigned two years over Israel.
1 Kings 22:51 Cross References - KJV
1 Kings 15:25
25 And Nadab the son of Jeroboam began to reign over Israel in the second year of Asa king of Judah, and reigned over Israel two years.
1 Kings 22:40
40 So Ahab slept with his fathers; and Ahaziah his son reigned in his stead.
2 Kings 1:17
17 So he died according to the word of the LORD which Elijah had spoken. And Jehoram reigned in his stead in the second year of Jehoram the son of Jehoshaphat king of Judah; because he had no son.