Ankou

Ankou is a servant of death in Breton, Cornish, and Welsh.

Background

Ankou appears as a man or skeleton wearing a black robe and a large hat that conceals his face, or, on occasion, simply as a shadow. He wields a scythe and is said to sit atop a cart for collecting the dead, or to drive a large, black coach pulled by four black horses and accompanied by two ghostly figures on foot.
According to one legend, he was the first child of Adam and Eve. Other versions depict Ankou as the first dead person of the year, charged with collecting others' souls before he can go to the afterlife. In an alternate origin, he was a cruel prince who met Death during a hunting trip and challenged him to see who could kill a black stag first. Death won the contest and the prince was cursed to roam the Earth as a ghoul for all eternity. Sometimes he is depicted as the king of the dead whose subjects have their own particular paths, along which their sacred processions move.
Ankou is mentioned by Anatole Le Braz, a writer and collector of legends, in The Legend of Death:

Appearance in subcultures

Every parish in Brittany is said to have its own Ankou. In Breton tradition, the squealing of railway wheels outside one's home is supposed to be Karrigell an Ankou. Similarly, the cry of the owl is referred to as Labous an Ankou. The Ankou is also found on the baptismal font at La Martyre where he is shown holding a human head.