I love Kurt Vonnegut. One of my favorite books (and characters) is Eliot Rosewater. WDYT of Rosewater as a mn for a boy? Too feminine despite the reference?
Jonas Rosewater?
Louis Rosewater?
Another mn I'd consider is Proteus, for Paul Proteus, the main character of his first novel. It's not as pretty as Rosewater, though.