Arpus, Nappas, Narpos, Warpus
An ancestor of Lancelot and Galahad.
In the Vulgate Cycle, he is called the son of Celidoine and grandson of Nascien, but Malory skips Celidoine and makes him the son of Nascien. Narpus’s son was also named Nascien.
He ruled North Wales.
Sources
Vulgate Queste del Saint Graal | 1215-1230
Vulgate Estoire del Saint Graal | 1220-1235
Le Morte Darthur | Sir Thomas Malory, 1469-1470