Gawrsh, I can't even pronounce it! The only one I've known was
Dutch, so it sounded like rreKHIna, with the KH 'like the -ch in Scottish "loch"', as they always say. She was known as
Gina, same sounds.
So, are you looking at reGEEna or reGIEna? Or, going back to Latin, RAYgeena I suppose?
I can't say I like the idea: seems pretentious in a way that
Elizabeth and
Victoria somehow don't.