I'm not crazy about it, even as a nn, but as a fuill name it is way too childish, it would never age well past about kindergarten. It's like Allie or Katie, I just can't take it seriously. Also, and this is silly, the sound of it reminds me of Rachel Ray the TV chef (aka the Human Pomeranian, or Cooking on Crystal Meth) this very hyperactive woman who is always talking about EVOO, or extra virgin olive oil. She pronounces it EE Vee Oh Oh, and for some reason it annoys the heck out of me.
Eva is so pretty, and it's the ame syllables as Evie. Eva Lynn is cute, although it does invite "evil" jokes. Eva Rosalynn is pretty too.