41 Jehoshaphat the son of Asa began to reign over Judah in the fourth year of Ahab king of Israel.
1 Kings 22:41 Cross References - WEB
1 Kings 22:2
2 In the third year, Jehoshaphat the king of Judah came down to the king of Israel.
1 Chronicles 3:10
10 Solomon’s son was Rehoboam, Abijah his son, Asa his son, Jehoshaphat his son,
2 Chronicles 17:1
1 Jehoshaphat his son reigned in his place, and strengthened himself against Israel.
2 Chronicles 20:31
31 Jehoshaphat reigned over Judah. He was thirty-five years old when he began to reign; and he reigned twenty-five years in Jerusalem. His mother’s name was Azubah the daughter of Shilhi.