It's easy to see why people would think this is a girl's name at first sight. I only knew because of
Emlyn Williams, the Welsh playwright / actor.
Emlyn GarethEmlyn HughEmlyn PatrickEmlyn Robert
I have more, but I'm not sure if you're interesting in
Emlyn as a boy's name.
Emrys (=
Ambrose) is a similar name you might prefer for a boy.