Re: using a boys middle name for my little girl.
I think it's okay. I mean, a lot of people have their mother's maiden name as their middle name, so middle names don't have to be "namey" (like it doesn't have to be something you'd go by). Although a lot of people use middle names as alternate names, in case they don't like their first name and want to go by something else. So maybe you could give her two middle names, "Ashlynn [girl name] John [last name]".