Hmm I'm in two minds. I'm not against Greek mythology names, some girl ones are lovely imho. But Orpheus..could be trying a bit hard.
Gawd I dunno
. I do think people grow into a name and claim it as their own. To start with people will think Orpheus=Unusual Greek name, but soon they'll think of it as the person they know and it'll mean him.
I've changed my mind...go for it! 