NIGHTBRINGER | The Arthurian Encyclopedia

Castis

Castris

The King of Wales and North Wales in the days of Uther Pendragon.

He married Herzeloyde (Herselojde) (later Perceval’s mother) from the Grail Family. He died before their marriage was consummated, and Herzeloyde inherited his throne and lands.


Source
Parzival | Wolfram von Eschenbach, 1200–1210