I really wish I had something amazing to contribute, but I'm still on my first cup of coffee...

There are Fairy Tales and Fairy Tales, really. Some of the most well-known ones--Beauty and the Beast, Sleeping Beauty etc--were actually written, composed, what-have-you by French fabulists. Were they drawing on previous tradition? Almost certainly. Writers do that. But you'll also notice that many of these "Fairy Tales" don't actually feature Fairies. Not like Knockgrafton or Aikendrum. The closest I can think to an actual Fairy presence in a popular tale is the dwarf in Snow White and Rose Red.

So I guess I'm wondering, what do you mean by "Fairy Tale?" Stories from one oral tradition or another, sometimes codified, often told to children as object lessons? Or actual stories about the little people and/or encounters with them?