In the second year of the reign of Jehoash son of Jehoahaz over Israel, Amaziah son of Joash became king of Judah.
Amaziah, the son and successor of Joash, is the king whom here we have an account of. Let us take a view of him, I. In the temple; and there he acted, in some measure, well, like Joash, but not like David, Kg2 14:3.
Commenting on 2 Kings 14:1-7
In the second year of Joash son of Jehoahaz king of Israel reigned Amaziah the son of Joash king of Judah. As Joash king of Israel began to reign in the thirty seventh of Joash king of Judah, Kg2 13:10, who reigned forty years, Amaziah must therefore begin his reign in the fourth of Joash king of Israel; this therefore must be understood of his...
In the second year of Joash - This second year should be understood as referring to the time when his father Jehoahaz associated him with himself in the kingdom: for he reigned two years with his father; so this second year of Joash is the first of his absolute and independent government. - See Calmet.