Seelie

In mythology and folklore, fairies are classified in a variety of ways. Two of the most prominent categories, derived from Scottish folklore, are the division into the Seelie Court and the Unseelie Court. William Butler Yeats, in Irish Fairy and Folk Tales, further divided them into the Trooping Fairies and the Solitary Fairies. These categories are generally applied to any fairy-type creature, from elves, pixies and brownies to ogres and giants.