I prefer Agnieszka, the original spelling I believe. Agnieszka Renée is very nice, but I'd only use Renée as René is strictly a male name in French.MirandaEDIT: Forgot to accent a Renée
I've heard of Anouska, but have never seen Anezka. It certainly is original. I think it could grow on me. (By the way, I recommend Renee for a girl instead of Rene.)