Melville Amadeus Henry Douglas Heddle de La Caillemotte de Massue de Ruvignés, 9th Marquis of Ruvigny and 15th of Raineval (b. in London, 1868; d. in London, 1921), was president of the Legitimist Jacobite League of Great Britain and Ireland (one of the leaders of the Neo-Jacobite movement), a prolific author of genealogical works, and a committed member of the Roman Catholic Church.