Hags of Gloucester
In Peredur, a pack of nine witches who lived with their father and mother.
They killed one of Peredurís cousins and maimed an uncle. Peredur saw the head of his slain cousin on a platter (this cousin corresponds to the murdered Goondesert in the Third Continuation of Chrťtienís Perceval), and he learned that he was fated to destroy the Hags for these actions.
Peredur was eventually led to their lair by another cousin in disguise, and he killed the Hags with the help of Arthurís other warriors.
Hag of Hell | The Legend of King Arthur
Percivale | The Legend of King Arthur