I'm glad you're considering it for a boy. It sounds masculine to me despite being common for girls these days. I'm actually not fond of it for girls because it sounds too masculine and sturdy like
Gordon. A boy named
Morgan would probably know girls with his name, but I don't think he'd be teased. There are a lot of people who probably know that
Morgan is used for males as well. Most people in the U.S. have at least heard of
Morgan Freeman, I think, so that helps some.
I like all of your
Morgan combos. I'd avoid
Morgan Aubrey though since it's sexually ambiguous as you mentioned. It's too bad because the names go together well. People might think he was a girl based on the name alone considering that
Aubrey is now in the top 100 for girls in the U.S.
Morgan Ambrose and
Morgan Elias are really handsome. I like
Morgan Alasdair and
Morgan Everett quite a bit too.
Some more ideas:
Morgan SilasMorgan EvanderMorgan XavierMorgan SamuelMorgan Alaric