Marie Anne de Bourbon, Légitimée de France, born Marie Anne de La Blaume Le Blanc, by her marriage Princess of Conti then Princess Dowager of Conti, suo jure Duchess of La Vallière and of Vaujours was a French noblewoman as the eldest legitimised daughter of Louis XIV, King of France, born from his mistress Louise de La Vallière, and the king's favourite daughter. Wikipedia