2 Chronicles 21:1-3

Jehoshaphat's son, Jehoram becomes king

1 Then Jehoshaphat died as his ancestors had done. And people buried him in David's city, with his ancestors. And Jehoram his son ruled Judah instead. 2 Jehoram had brothers who were also sons of Jehoshaphat. They were Azariah, Jehiel, Zechariah, Azariahu, Michael and Shephatiah. All these men were sons of Jehoshaphat, king of Israel. 3 Their father had given many gifts of silver, gold and valuable things to them. And he gave to them cities with walls in Judah. But Jehoram was the oldest son. So his father said that he should be the next king.

21:1Jehoshaphat died in about 849 BC.
21:2Jehoshaphat was king of Judah. But Judah is the kingdom of two tribes of the Israelites. Perhaps that is why it says Israel here.