Iseult (alternatively Isole, Yseult, Isode, Isoude, Isotta) is the name of several characters in the Arthurian story of Tristan and Iseult. The most prominent is Iseult of Ireland, wife of Mark of Cornwall and adulterous lover of Sir Tristan. Her mother, the Queen of Ireland, is also named Iseult. The third is Iseult of the White Hands, the daughter of Hoel of Brittany, sister of Sir Kahedin, and eventual wife of Tristan.