Eh. I know a Reauna, and my mate Katrina's second name is Reanna (Katrina Reanna... meh). I'm not a fan of any spelling of Rhianna, it sounds like a feminization of Ryan (though I know it is not.) It's not very pretty, and I associate it solely with Robyn Rihanna Fenty, which isn't necessarily a bad association, but I wouldn't want my child's name to immediately spur thoughts of an adequate "RnB" singer.