Fifteen years. —He came to the throne in the second year of Jehoash, who reigned sixteen years (2 Kings 13:10), and re…

And Amaziah the son of Joash king of Judah lived after the
death of Jehoash son of Jehoahaz king of Isra…

Amaziah survived his conqueror fifteen years. He was slain by his own subjects. Azariah, or Uzziah, seems to have been very young when his father w…