I've only ever heard it as a girls' name.
I don't like the sound. The meaning is okay.
I would pick a middle that resonates with the meaning, to me, because that's what I like about it.
Ainsley Khione
Ainsley HalcyonAinsley FridaAinsley RainaAinsley Ventura
Ainsley MirandaAinsley JessamineAinsley Oreithyia
Ainsley ElioraAinsley Elowen
I'll go with
Ainsley Ventura for now.