Pippa is darling. It's fresh, energetic and happy sounding.
I know a woman whose niece is named
Gabrielle Pippa. Her father's mn is
Philip and the mother didn't like
Philippa either.
Pippa can stand on its own. But if you're looking for other formal names for it, how about:
PenelopePhiladelphiaPersephonePerpetuaEpiphany / Epiphania
OlympiaAgrippinaTheophila ("thee-AH-fil-uh")
Patricia