Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Girart de Roussillon, also called Girard, GÃ©rard II, Gyrart de Vienne, and Girart de Fraite, (c. 810â€“877/879?) was a Burgundian chief who became Count of Paris in 837, and embraced the cause of Lothair I against Charles the Bald. He was a son of Leuthard I, Count of FÃ©zensac and of Paris, and his wife Grimildis. Girart is not described as being from Roussillon in authentic historical sources. The placename in his title is derived from a castle he built on Mont Lassois, near Vix and ChÃ¢tillon-sur-Seine. Girart de Roussillon also is an epic figure in the cycle of Carolingian romances, collectively known as the Matter of France". In the genealogy of the cycleâ€™s legendary heroes, Girart is a son of Doon de Mayence and appears in the various irreconcilable events."