I love all 3 names! My fav being Noah. I think they all work for babies/kids/adults nicely. I don't personally know any men named Noah, only children - but I think it would be very handsome on a grown man (which is why it's one of my top contenders) - plus it makes me think of the main character from The Notebook.
I prefer Emersyn, nn. Emmy for a girl, though.