Sure, sure. But the world is a lot mot international now then it was 50 years ago. What if
Pippa joines BtN in a few years? All Swedes would laugh, maybe even all Scandinavians (I don't know if pippa is used as a slang in Denmark, Norway or Finland too).
It wouldn't be funny, but it wouldn't be that bad, right? But what if cute little
Pippa falls in love, with a Swede? What about all the Swedes she will meet and talk with through out her life?
I wouldn't recomend it. I like
Philippa, so I would name her
Philippa. In that case, she could go by
Pippa in a English speaking country where they have no idea what it means, but she can choose to go by a different nickname when she wants (or needs) too.