Hmm I don't care if it is used sometimes or all the time I still think that you should decide what you want to call your child and name her that if the nickname is a full name in its own right (not something cutesy or incomplete like
Steph or
Lulu). But I guess you could call a
Violet Viola if you wanted to. It's just my opinion and I wouldn't use
Viola as a nickname. Maybe that's because I'm not a big nickname person anyway...