[name]Just[/name] curious - are there any other girl names besides [name]Frances[/name]/[name]Francesca[/name] that would give the nn [name]Frankie[/name]?
[name]Hi[/name]! Hmm…I can’t think of any that don’t involve a [name]Fran[/name] name, but you could always get creative and give her FRK or FRN initials, calling her [name]Frankie[/name] as a nickname ([name]Fiona[/name] [name]Ruby[/name] [name]Katherine[/name], [name]Felicity[/name] [name]Rose[/name] [name]Katherine[/name], [name]Fern[/name] [name]Rosalie[/name] [name]Kate[/name], etc.)
You could also go with [name]Freya[/name] to get the FRA, and a K middle, like [name]Katherine[/name], to get the K sound for [name]Frankie[/name].
I think that [name]Frankie[/name] is such a cute nickname! 
Good luck!
[name]Francine[/name] but that’s probably not what your looking for 
My name is just [name]Frankie[/name], I don’t see what’s wrong with just being [name]Frankie[/name] (I am a female). If it’s just too masculine pretend you have english heritage, It’s more of a girls name here. However:
Francia- (fr-ah-n-see-ah) (fran-thee-ah)
francoise
or you could push the boat out, call her cesca, and have frankie as a bit of fun.
I have known a girl named [name]Charlie[/name] so you could always do just [name]Frankie[/name]. I do like [name]Frances[/name] as a fn. I’m sure most people find [name]Francine[/name] dated, but I think it could be cute on a young girl. There’s always Francoise which is maybe a little silly where I am in the US, but kind of cute at the same time. Or you could do something like [name]Francie[/name] or Franley which are still nicknamey like using just plain [name]Frankie[/name], but is at least obviously female if you saw it written on a resume or somewhere. Maybe [name]Franca[/name]?