Claim: The first holder of the title "Duke of Châtellerault" was William Alexander Louis Stephen Douglas-Hamilton in 1895.
Evidence: 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. William Alexander Louis Stephen Douglas-Hamilton, 2nd Duke of Châtellerault 1895