Technically a lot of unisex names today were traditionally male names BUT now majority are used for girls.
I would be shocked to hear the name Ashley or Casey on a man nowadays no matter how old they were, they sound so very feminine and i'm not just saying that because they are mainly used for girls now they genuinely sound very girly i think it may be the "Y" ending that you see in a lot of common girls names like Emily, Lily, Etc.
Even though they were classed as male names back then i can't believe some of these names were ever used for men and i personally think many boys couldn't pull those names off today.
I guess if varies where you live but I was born in the UK and have lived in the US for 8 years and have been amazed by how many names that are still used for boys in the UK are solid female names over here.