Leslie is 100% a girls' name in my neck of the woods, though I think it's still used for boys in England. I like it much better for a boy.
Joyce,
Jocelyn, and
Evelyn started out as boys' names too.
I know a little boy named Shelby--that's cute for a boy, but I can't stand it for a girl. i also love
Meredith and
Morgan for a boy.