Claim: The title "Duke of Châtellerault" originated from a commune in the Vienne department in the Nouvelle-Aquitaine in France, where its first titleholder was François de Bourbon-Montpensier in 1492.
Evidence: It takes its name from Châtellerault, in the Vienne region. Châtellerault (pronounced [ʃa.tɛl.ʁo) is a commune in the Vienne department in the Nouvelle-Aquitaine region in France. The first title was created for François de Bourbon-Montpensier, a younger son of Gilbert, Comte de Montpensier, who was created Viscount of Châtellerault (Vicomte de Châtellerault) in February 1514. François de Bourbon-Montpensier, 1st Duke of Châtellerault (1492–1515) 1492