I, for one, see Genevieve and Geneviève as being two completely different names. Like other comments have already stated, BTN lists Genevieve as being a name of English origin. I also have come across numerous sources that imply Genevieve is a variant/English alternative to the Welsh, Guinevere... I can't be sure if that's a correct statement or not, but given the fact that Genevieve and Geneviève clearly have different connotations and stances within history, Genevieve should be recognised as being a name in her own accord.
To the person talking about the "white wave" meaning - yeah, I've noticed that too, in several name books. I think it's formal meaning is "fair and white" or something. A very medieval-queen sounding name. Little bit of trivia - the name Jennifer is derived from Genevieve - can you tell? ;-)