Amon reigned two years (642-640 B.C.). Rather than continuing to follow the Lord, which his father"s repentance encouraged, Amon reverted to the policies of Manasseh"s earlier reign and rebelled against Yahweh completely. This provoked some of his officials to assassinate him ( 2 Kings 21:23). Again we see that rebellion against God often leads to one"s premature personal destruction (cf. 1 John 5:16). To their credit, the leaders of Judah executed the king"s assassins and so prevented anarchy. [source][source][source]
Amon may have been the only king of either Israel or Judah who bore the name of a foreign god. Amon-Re was the sun god of Egypt. His father may have named him in honor of this god. However, the Hebrew word amon means "faithful," so his name may not connect with Amon-Re. [source][source][source]