Well, I've seen them all in the girl's section of the name book, plus I know girls named
Remy,
Gael,
Avery, and
Talbot.
Avery and
Talbot are my sisters. I can show you pictures if you're that set on them being boy's names.
Arden is listed as a girl's name in the name book: Latin, "ardent, sincere"
Harper: English, "musician, writer"
Remy: French, "jaded"
Gael: Hebrew, "energetic"
not meaning to start an argument, but I have never heard these names used on boys, and I have heard all of them on girls.