The Tristan and Iseult legend – a tragic love triangle between the Irish princess Iseult, the Cornish knight Tristan and his uncle King Mark – is also oft alluded to in the work, particularly in II.4. Fargnoli and Gillespie argue that "various themes and motifs throughout "Finnegans Wake", such as the cuckoldry of Humphrey Chimpden Earwicker (a King Mark figure) and Shaun's attempts at seducing Issy, relate directly to Tristan and Isolde [...] other motifs relating to Earwicker's loss of authority, such as the forces usurping his parental status, are also based on Tristan and Isolde."