According to Gottfried, the region of south-west France in which the dwarf Melot, who spied on Tristan and Iseult for King Mark, lived. According to Geoffrey, Duke Guitard ruled it until Duke Hoel conquered it as part of Arthur’s campaign in Europe. However, Eilhart von Oberge called the dwarf Aquitain rather than the region.

In the Vulgate Lancelot, it is ruled by King Claudas, and in La Tavola Ritonda, King Amoroldo of Ireland holds the dukedom of Aquitaine.