I'd rather see
Yvonne than Giovonnie. And I don't even like
Yvonne much! It actually rather offends me when people play silly spelling games with names that have got perfectly normal forms in their own language. There's nothing wrong with ignorance - I've got a lot of it myself - and it's great if you use it as a springboard to obtain real knowledge, but showing it off in public just isn't cool at all.