I like the nn Calle(pronounced like [name]Callie[/name], also like [name]Halle[/name]) but I am not sure about using [name]Calista[/name] or [name]Calliope[/name] as the full name. I do love the classic [name]Caroline[/name].
[name]Do[/name] you think I could get away with Calle as a nn for [name]Caroline[/name]?
Yeah, definitely! I know a [name]Carol[/name] that is often called [name]Cal[/name], so yeah Call(i)e from [name]Caroline[/name] could work too.
Absolutely!
I definitely think it could work!!
[name]Calla[/name], [name]Clarence[/name], [name]Calandra[/name], and [name]Charlotte[/name] could also give you Calle, although I love [name]Caroline[/name]. 
I also love [name]Tabitha[/name]/[name]Talitha[/name] nn [name]Talley[/name].
Good luck!
[name]Love[/name] it!!! Go for it! It is so cute!