1 Kings 22:2
However, in the third year, Jehoshaphat king of Judah went down to visit the king of Israel,

1 Chronicles 3:10
Solomon's son was Rehoboam: Abijah was his son, Asa his son, Jehoshaphat his son,

2 Chronicles 17:1
Asa's son Jehoshaphat became king in his place, and he strengthened himself against Israel.

2 Chronicles 20:31
So Jehoshaphat reigned over Judah. He was thirty-five years old when he became king, and he reigned in Jerusalem twenty-five years. His mother's name was Azubah daughter of Shilhi.

began to reign `Began to reign alone'

1 Kings 22:51
In the seventeenth year of Jehoshaphat's reign over Judah, Ahaziah son of Ahab became king of Israel, and he reigned in Samaria two years.