CLARISSANT

[Arthurian] A daughter of Lot and Morgause who married Guiromelant. She was the mother of Guigenor. According to a single Arthurian romance she was the sister of Gawain, who lived in a magic castle. In the same text, 'Sir Percevelle', Percival overcomes her lover Guireomelant. Nowhere else is Gawain said to have a sister