Aside from Kinley, I automatically think "guy" for all of them for the most part. Kinley seems like it could go either way, but American parents would probably be more apt to use Kinley for a girl considering it's similarity to popular names for girls like
Kimberly.
I have heard
Sam and
Alex used as nicknames for
Samantha and
Alexandra,
Alexa,
Alexis, etc., so I can imagine them as unisex. "Boy" comes to mind first though.