In the medieval Welsh text Peredur son of Efrawg, the Arthurian hero who replaces Perceval as the central character is Peredur.
Peredur son of Efrawg is one of the Three Welsh Romances, a group of Middle Welsh narratives associated with the Mabinogion tradition. Its plot has significant similarities to Chrétien de Troyes’s Perceval, including a young hero’s education, adventures, and encounters with striking courtly and supernatural scenes.
Peredur is not simply a Welsh spelling of the French character. The narrative has its own episodes, emphases, and textual history. Its relationship to French Arthurian romance remains debated, because scholars have proposed different directions of influence and possible shared sources.
The work is especially relevant to Grail studies because one episode resembles the procession in Perceval, although the object and its meaning are not identical to the later Holy Grail tradition.