Hmmm.... I can see it in a pattern of -n girls' names way -
Lauren,
Aislin,
Allison,
Bethan etc - or a trendy-esque unisex way, but I wouldn't use it.
Evan has always been strictly masculine to me.
Evan Rachel Wood probably has made it seem more unisex, but I don't care much for her ilk and there's a good chance it'll simply seem like a fan name.