Moses was next in line to be Pharaoh. The jews have gotten around a lot.
Indeed, Europeans are generally incredulous about Americans' ethnic tribalism, i.e., identifying oneself by one's ancestry. Where many Americans would say "I'm Italian" or "I'm Irish," a European would look at him and say you are an American of Italian or Irish heritage. I knew an officer in the French army who had an Italian family name (his grandfather had moved to France from Italy) but if you were to ask him, he would say that he was French, not Italian.