In 1743 , his paternal grandmother , Françoise-Marie de Bourbon the formidable Dowager Duchess of Orléans , and Louise Élisabeth , Dowager Princess of Conti arranged his marriage to his seventeen-year old cousin , Louise Henriette de Bourbon ( 1726-1759 ) , a member of the House of Boubon-Conti , another cadet branch of the House of Bourbon .
In 1743 , his paternal grandmother , Françoise-Marie de Bourbon the formidable Dowager Duchess of Orléans , and Louise Élisabeth , Dowager Princess of Conti arranged his marriage to his seventeen-year old cousin , Louise Henriette de Bourbon .