How about Jocelyn and call her Joss. I love both names. I named all my children Biblical names. Nathanael James, Joel David, and Naomi Ruth. Let me know if I can suggest any other names. Have a great day.
Is There A Female Form Of The Name Joshua?
I'm not really sure if this is what your looking for or not but, I know a girl named Joslin or I guess it could be Joslyn but I was thinking that's somewhat close to Josh/Joshua.