Fairy (Fada, Fae, Fay, Fas, Fata, Fey): "The word fairy is used to represent the species of folkloric, legendary, and mythological creatures falling into the category of dwarf, elemental spirit, elf, nature spirit, sidhe, Tuatha de Danann, as well as similarly described animals, beings, monsters, and spirits." ~ Teresa Bane

Want to learn more about Fae? Here are a couple comprehensive encyclopedias.

An Encyclopedia of Fairies: Hobgoblins, Brownies, Bogies, and Other Supernatural Creatures by Katerine Briggs is a classic resource for those who want to learn more about the fae of folklore and mythology. This comprehensive encyclopedia is out of print and now sells for hundreds of dollars, but you can read it for free at the Internet Archive open library. (You can often find downloadable PDF copies on Scribd as well.)

Encyclopedia of Fairies in World Folklore and Mythology by Teresa Bane is still available through Amazon and can be purchased in trade paper or in kindle digital formats.