My mother does not ever call anyone Maria, always Marie, even though their name is Maria, it drives me crazy!
Most of my close friends (and his!) can't spell his name because there are so many variations (Padraic, Padhraic, Padraig, Pauric, Pauraic etc etc) so it's unusual for someone other than family to get it right, therefore it always makes me smile.
what's great too is that you can even say it properly- and I've heard you in person!