Louise Marie Madeleine Fontaine
Louise-Marie-Madeleine Guillaume de Fontaine (after marriage known as Madame Dupin; 28 October 1706 – 20 November 1799) was a French "saloniste".
Marguerite Louise d'Orléans
Marguerite Louise received a rudimentary education at her father's court at Blois, to which he withdrew after the failure of the insurrection against his nephew Louis XIV of France known as the Fronde. Marguerite Louise enjoyed a close relationship with her half-sister, Anne Marie Louise, Duchess of Montpensier, "La Grande Mademoiselle", who took her and her friends to the theatre and royal balls; Marguerite Louise returned her sister's affection, attending Anne Marie Louise's "salon" daily and seeking her guidance in court matters. Marguerite Louise was convinced that Madame de Choisy advised her mother poorly in matters of court and ruined the negotiations for her marriage to Charles Emmanuel II, Duke of Savoy. In the end it had been her own younger sister Françoise Madeleine d'Orléans who married Charles Emmanuel in 1663. It was for this reason that when another proposal came in 1658, this time from Cosimo de' Medici, Grand Prince of Tuscany, Marguerite Louise asked her half-sister to bring it about.