Two unrelated meanings collide here. (1)
阿蒙 = Amun, the Egyptian sun-god of Thebes (also written Amen, Amon). (2) In classical Chinese
阿蒙 refers to
吕蒙, a Three Kingdoms general of Wu who was dismissed as illiterate ('
吴下阿蒙', 'just plain old Meng of Wu') until he studied hard and astonished his peers — the source of
士别三日 当刮目相看.