Mark of Cornwall (, , , ) was a sixth-century King of Kernow (Cornwall), possibly identical with King Conomor. He is best known for his appearance in Arthurian legend as the uncle of Tristan and the husband of Iseult who engages with Tristan in a secret liaison, giving Mark the epithet "Cuckold King". King Mark In Old Welsh records, Mark is recorded as "March son of Meirchion" of Kernow (Cornwall). He is associated with governing portions of Gwynedd and Glamorgan in Wales. Mark has been identified with Conomor, a king of Domnonea and Kernev (Domnonée and Cornouaille) in Armorica. In his Life of St. Pol de Leon, Wrmonoc of Landévennec refers to a "King Marc whose other name is Quonomorus". Also rendered as Cunomorus, the name means "Hound-of-the-sea". An inscription on a sixth-century gravestone near the Cornish town of Fowey memorializes (in Latin) a "Drustanus son of Cunomorus", and it has been thought that this is the "Tristan son of Mark (alias 'Quonomorus')" of legend. The present location of the stone is at , but it was originally at Castle Dore. It has a mid-6th-century, two-line inscription which has been interpreted as DRVSTANVS HIC IACIT CVNOWORI FILIVS ("Drustan lies here, of Cunomorus the son"). A now-missing third line was described by the 16th-century antiquarian John Leland as CVM DOMINA OUSILLA ("with the lady Ousilla"). Ousilla is a Latinisation of the Cornish female name Eselt. The stone led to Mark's association with Castle Dore. Legend In most versions of the story of Tristan and Iseult, King Mark of Cornwall is Tristan's uncle. His sister is Tristan's mother, Blancheflor (also known as Elizabeth or Isabelle). In some later versions he is related to Tristan's father, Meliadus. Mark sends Tristan as his proxy to bring his young bride, Princess Iseult, from Ireland. Tristan and Iseult fall in love and, with the help of a magic potion, have one of the stormiest love affairs in medieval literature. Mark suspects the affair, and his suspicions are eventually confirmed. In some versions he sends for Tristan to be hanged, and banishes Iseult to a leper colony. Tristan escapes the hanging, and rescues Iseult from her confinement. Mark later discovers this, and eventually forgives them; Iseult returns to Mark, and Tristan leaves the country. The story is cyclical, with Mark repeatedly suspecting Tristan and Iseult of adultery and then believing that they are innocent. In Béroul's version,