Frise and la mer de Frise are somewhat nebulous place-names in Beroul's Roman de Tristran. Realizing the folly of their love, Tristran tells Iseut that he could leave Marc's service for that of the King of Frise, or else go to Brittany with his companion Governal: Later on Tristran has similar advice from the hermit Ogrin: The toponym is mentioned finally at Marc's court as a place of exile for Tristran, a realm beyond the sea where the king will hear of him no more:
