Hi,
Claire! Among South African Jews it's my impression that the girls tend to get two given names and the boys one. That's not counting their Hebrew names, that they use for liturgical purposes. So you have, say,
Morris marrying
Anne Penelope and that's what's on all the forms; but at the wedding it's
Moshe marrying Chana (not Chana Pnina!)
I'm fascinated that it's so different in
France.