I could not conceive of a boy called Roxy. The Roxy we knew was female. Too me it is definitely a female name.
Roxy is definitely a female name in my mind - there's a brand of sportswear called Roxy that's just for women
Coco has a beautiful Doberman girlfriend called Roxy. My friend at work has a working (retired) Springer called Roxy too (well her ex has her) - definitely a girls name.
Mollie, Addie, Quincy, Layla..my boy's name is Aspen but I think it works as a boy and girl name and it is unique. Aspen's mom's name was Lucy. And he has a sister named Rainie.