Well, we named our daughter
Arwen (picked it out way before the movies came out, so it's a bit of a bummer that with the popularity of the movies, everyone thinks we're LOTR fanatics), so I definitely think it's usable. And we love it--I think it's lovely written, and it sounds strong, yet feminine (though I admit, some people think it's a boy's name when they see it written). Her mn is
Claire (for a grandmother).