In Brythonic mythology, Cwn Annwn the hounds of Annwn. A pack of snow-white, red-eared spectral hounds which sometimes took part in the kidnappings and raids the inhabitants of the underworld sometimes make on earth, called the Wild Hunt.
Origin
Cwn Annwn have their origin in Welsh tales. The pack is known as the spectral hunt.
In Welsh they are associated to the sounds of migrating wild geese, and are said to be leading the souls of the damned to Hell.
The phantom chase is usually heard or seen in midwinter and is accompanied by a howling wind.
Another name of theirs is Cwn Mamau, standing for hounds of the mothers.
Etymology
The words Cwn Annwn stand for hounds of the otherworld or underworld.
Description
They are Welsh phantom dogs seen as a death portent. Their growling is louder when they are at a distance, and as they draw near the growling grows softer and softer.
Annwn is the Welsh underworld, a place ruled by Gwyn ap Nudd also known as Arawn, who is one in the same character.
Main Belief
In Welsh stories this land is the ever-living, and is full of magical beasts and treasures.
Almost every area in Britain has its version of phantom or fairy dogs.
See Also
Bran and Sgeolan, Fionn Mac Cumhal’s hounds in Celtic lore; [ [Cusith]], the fairy dog; Devil's Dandy Dogs, or Dando Dogs; Gabriel Hounds or Gabble Retchets Hounds of the Hills; The Fairy Raed; The Norse Wild Hunt; Sluagh or Fairy Host; The Wild Hunt; Wandering Jew