2 Kings 17:1 - Joseph Benson’s Commentary on the Old and New Testaments

In the twelfth year of Ahaz, began Hoshea to reign He usurped the kingdom in Ahaz's fourth year; but either was not owned as king by the generality of the people, or was not accepted and established in his kingdom till Ahaz's twelfth year. Nine years After his confirmation and peaceable possession of his kingdom; for in all he reigned seventeen or eighteen years; twelve with Ahaz, who reigned sixteen years, and six with Hezekiah.