Katarzyna was one of the kids with a Polish surname - I like it.
Carla was never popular here so it doesn't seem that dated.
Virginie is adorable.
Croí is the Irish for heart so Croía could come from that I am guessing. I have heard of Croí as a name before. On the other hand there is also a word cré which means earth.
Sam Seán is cute - Seán honours his grandfather. I think
Samuel would have sounded a bit odd with their surname, it would have been a bit hard to say - though I would have preferred the full name myself.
It could be
Padraic - I only heard it from my mother - she was not impressed with it!