Ygraine's son is ARTHUR, a 6-letter name. ARTHUR is a legendary British leader who appears in many stories and myths. He is best known for his role in the Arthurian legend, where he is the central character. He is the son of Ygraine and Uther Pendragon, and is the rightful heir to the throne of Britain. He is also known for his magical sword, Excalibur, and his court of knights, the Knights of the Round Table.