How about Magnolia for a girl? Don't know how country that is, though.

Dolly (Parton)
Patsy (Cline)
Reba (McIntyre)
Dixie (Chicks)
June (Carter)
Loretta
Faith
Shania
Wynonna
Dottie
Emmylou
Kitty
KD
Bonnie

I like the names you listed, but some were for guys. Just wanted to list a few more choices so your new girl can have maybe a girly name!