I have known only two people named
Wendy (one early 20's, the other middle aged), and yet there must be some air of datedness about it, because it does seem like a rather threadbare name to me. I love the literary tie, but now people think more about Hamburgers than
Peter Pan when they hear this name I fear.
I think the Wendys I knew did have it as a full name, so I rather like the idea of it being a nickname for something else.
If you like the energy of
Wendy but your husband hates it (that's always a bummer to deal with), what about:
MaisieDaisyShelbyTrilby
CecilyAveryLucyGelsey
???