Wow, that's some variety there, especially the Nicole & Cerah sets. I'm surprised to see Sally & Polly - and Cian! And Joy is very interesting. Do you think that would be pronounced the English way?
I think Cian's parents might be British or Irish. Joy would probably be pronounced "yoy"; we don't have the English J sound in Swedish. Polly seems to be rather trendy, at least among hipster parents who like P.J. Harvey.