2 Kings 11:21
Jehoash was seven years old when he began to reign.
2 Chronicles 24:1-14
Joash was seven years old when he began to reign. He reigned for forty years in Jerusalem. His mother was Zibiah, who was from Beer Sheba.
2 Kings 11:4
In the seventh year Jehoiada summoned the officers of the units of hundreds of the Carians and the royal bodyguard. He met with them in the Lord's temple. He made an agreement with them and made them swear an oath of allegiance in the Lord's temple. Then he showed them the king's son.
2 Kings 22:1
Josiah was eight years old when he became king, and he reigned for thirty-one years in Jerusalem. His mother was Jedidah, daughter of Adaiah, from Bozkath.