My DD, Ariana, is pronounced A-ri-anna. My SIL insists on pronouncing it A-ri-arrna. Not a problem in itself but you think she'd pick up on the way her parents like to say it (but then she's very good at not listening to anyone but herself!). She'll even repeat it back to me her way.
PS, got it from a book I read 20 years ago - NOT Harry Potter!!
PPS, am most annoyed at Imogen Thomas (whoever she is!)