2 Kings 3:1

Now Jehoram the son of Ahab began to reign over Israel in Samaria in the eighteenth year of Jehoshaphat king of Judah, and reigned twelve years.

2 Kings 1:17

So he died according to the word of Jehovah which Elijah had spoken. And Jehoram began to reign in his stead in the second year of Jehoram the son of Jehoshaphat king of Judah; because he had no son.

1 Kings 22:51

Ahaziah the son of Ahab began to reign over Israel in Samaria in the seventeenth year of Jehoshaphat king of Judah, and he reigned two years over Israel.

2 Kings 8:16

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.

Treasury of Scripture Knowledge

Summary

Now Jehoram the son of Ahab began to reign over Israel in Samaria the eighteenth year of Jehoshaphat king of Judah, and reigned twelve years.

Bible References

Jehoram

2 Kings 1:17
So he died according to the word of Jehovah which Elijah had spoken. And Jehoram began to reign in his stead in the second year of Jehoram the son of Jehoshaphat king of Judah; because he had no son.
2 Kings 8:16
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.

American Standard Version Public Domain