At the age of 15 , he married his second cousin , Marie AdÃ laÃ de of Savoy , the daughter of Victor Amadeus II , Duke of Savoy and Anne Marie d'Orl Ã ans . At the age of 15 , he married his second cousin , Princess Marie-Ad Ã laÃ de of Savoy , the daughter of Victor Amadeus II , Duke of Savoy and Anne Marie d'Orl Ã ans .