Gabriel de Rochechouart de Mortemart Duke of Mortemart (1600 – 26 December 1675) was a French nobleman and father of the Marquise de Montespan. He was a friend of the French King Louis XIII. Through Madame de Montespan he is an ancestor of Philippe Égalité Louis-Philippe I and Prince Henri Count of Paris the present Orléanist pretender to the French throne.