Amenhotep I ä˝mĕnhō´tĕp, ā˝– [key] or Amenophis I ă˝mĕnō´fĭs [key], fl. 1570 BC, king of ancient Egypt, of the XVIII dynasty son and successor of Amasis I . His chief exploits were military. He pushed southward into Nubia and reestablished Egypt"s boundary at the Second Cataract of the Nile , as previously fixed by Sesostris III . He invaded Syria as far as the Euphrates. His successor, Thutmose I , was not his son.