Louise Diane d'Orléans ( 27 June 1716 -- 26 September 1736 ) was the sixth daughter and last child of Philippe d'Orléans , Duke of Orléans ( `` Regent of the Kingdom '' from 1715 to 1723 ) and his wife , Françoise Marie de Bourbon , the youngest legitimised daughter of King Louis XIV of France and his mistress , Madame de Montespan .
Louise Diane d'Orléans ( 27 June 1716 -- 26 September 1736 ) was the last child of Philippe d'Orléans , Duke of Orléans ( `` Regent of the Kingdom '' from 1715 to 1723 ) and his wife , Françoise Marie de Bourbon , the youngest illegitimate daughter of King Louis XIV of France and his mistress , Madame de Montespan .