Agreste
An ancient pagan king of Camelot.
When Josephus (Josephe), the son of Joseph of Arimathea, began converting Agrestes’ people to Christianity, the king pretended to go along. As soon as Josephus had left, however, Agrestes forced his people back to their heathen religion and killed the disciples that Josephus had left in the city.
Following this massacre, Agrestes went mad, began to eat his hands, slaughtered his family, and finally committed suicide by diving into a fire. After his death, Josephus returned and converted Camelot to Christianity for good.
Source
Vulgate Estoire del Saint Graal | 1220-1235