In Arthurian legend, Kay is King Arthur's foster brother and later seneschal, as well as one of the first Knights of the Round Table. In later literature he is known for his acid tongue and bullying,
"Keux's" attributed arms
Culhwch and his companions at Ysbadadden's court in Ernest Wallcousins’ illustration for Celtic Myth & Legend (1920)
"Sir Kay breaketh his sword at ye Tournament" from The Story of King Arthur and His Knights by Howard Pyle (1903)
Kay and Lancelot in a Siedlęcin Tower fresco (early 14th century)
Perceval, the Story of the Grail is an unfinished Arthurian verse romance written by Chrétien de Troyes in Old French during the late 12th century. Starting as the eponymous tale of the young Perceval
Perceval arrives at the hermitage in a 15th-century illustration of Perceval
The story's scene of Gawain on the Perilous Bed (Gauvain au lit périlleux) engraved in a 14th-century ivory
The opening lines of the 14-century Welsh-language Peredur from the Red Book of Hergest (Jesus College, Oxford MS 111)