Iseult is from the Old French Iseut — adapted from the Welsh Esyllt (of fair aspect). A modern American baby name in the broader Celtic-medieval heritage aesthetic. Iseult is the Irish princess at the heart of Tristan and Iseult — one of the foundational love legends of medieval Europe, predating and influencing the Arthurian Lancelot-Guinevere romance. Daughter of King Anguish of Ireland, betrothed to King Mark of Cornwall, she falls in love with Mark's nephew Tristan after they share a love potion. The legend spread across Europe from the 12th century — central works include Béroul's Le Roman de Tristan (c. 1170), Thomas of Britain's Anglo-Norman version, Gottfried von Strassburg's Middle High German Tristan (c. 1210), and Sir Thomas Malory's Le Morte d'Arthur (1485). The legend inspired *Richard Wagner's opera Tristan und Isolde*** (1865) — a foundational work of late Romantic opera that revolutionized Western harmony.
Featured throughout Celtic and medieval European heritage.
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Iseult reduces to eight.