NIGHTBRINGER | The Arthurian Encyclopedia

Gwalhafed fab Gwyar

Gwalhaved

In Culhwch, brother of Gwalchmai, and thus one of the sons of Gwyar. He was one of Arthur’s warriors.

Later tradition seems to suggest that he is the original of the Arthurian knight Sir Galahad.


Source
Culhwch and Olwen | Late 11th century