Ygierne, also known as Igraine, is a character from Arthurian legend, primarily recognized as the mother of King Arthur. She was originally the wife of Gorlois, the Duke of Cornwall, and later became the lover of Uther Pendragon after Uther disguised himself to seduce her. Ygierne's story is significant in the context of Arthur's birth and the subsequent events that shape the Arthurian tales.