There are many different faerie organizations. Each has its own hierarchy and local legends.

Scotland

Fairies can also be divided into the Seelie court and the Unseelie court.

The Seelie court, or the blessed court, a group of rather beneficial spirits, is friendly towards humans.  The Selie Court are some of the more aristrocratic faeries, and are known as tropping, or heroic faeries. Scottish folklore presents them as a huge host of light and benevolence riding on the night air.

The Unseelie Court  or Unblessed Court contains the most malicious, malevolent and evil of the faeries, and a number of monsters of horrible appearance and fearsome abilities as well. They comprise the Slaugh, or The Host, the band of the unsanctified dead who fly above the earth, stealing mortals and take great pleasure in harming humans.  Some Scottish legends say they were all once members of the Seelie Court who fell from grace. The Court travels on the night winds from where their unnerving cackles and howls can be heard. They have no method of reproduction, so they enslave mortals whom they think would never be missed and carry them along to become one of them.

The Seelie Court and its counterpart, the Unseelie Court are often at war,and humans may get caught in the middle of such battles. They acquired the title "Court" because they also act as arbiters and judges in faery disputes.

Ireland

The great Tuatha de Danann of Ireland flead to Tir Nan Og after their defeat by the Milesians, however those who remained in Ireland became the Daoine Sidhe. Side (Shee) is gaelic for 'people of the hills'. Orriginally it referred to the mounds in which faeries lived, though it has now come to refer to the inhabitants as well. Their king is Finvarra, who like all of his clan is a skilled warrior. He is also fond of chess playing and women. Despite the fact that his wife, Donagh, is one of the most beautiful women above or below the ground, he is known to abduct brides-to-be. Like the Seelie Court, the Daoine Sidhe, enjoy riding and are famous for their faerie steeds, which can carry a rider faster than the wind over land or water.

Another group of faeries in Ireland inhabit the Lough Lean. their ruler is O'Donoghue who rides forth from the lake every May Day on a war steed to ride into the surrounding mist.

Wales

Whales has perhaps more clans of faeries than any other area. In Glastonburry Tor, famous from Arturian legends, Gwyn ap Nudd rules over the Plant Annwn (roughly- family of hades). Long ago, on every New Year's Day, a door would appear in the side of a great rock next to a certain lake. Those who entered found that it lead to a passage that ended on the island in the middle of the lake. This island was a beatiful garden kept by the Gwrgedd Annwn, who would serve wonderful food to the travelers and treat them as honored guests. They warned the fortunate mortals that the doorway was a secret and that nothing could be taken from the garden. One mortal took a single flower from the garden and as soon as he touched the soil of earth, all of the other other travelers were expelled and the doorway was closed, never to reopen again.

Brittany

Brittany has several classes of Faeries, the most popular being the Korrigans who have been counted to be more than 10000 in the past.