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".
Charlotte Aglaé d'Orléans
Few expected the marriage to succeed, as Charlotte Aglaé had no desire to leave France. Her distant cousin, Marguerite Louise d'Orléans, who had previously been wedded against her will to Cosimo III de' Medici, Grand Duke of Tuscany in 1661, had suffered through a disastrous marriage. Eventually, Marguerite was forced to return to France in disgrace. People assumed that the same fate awaited Charlotte Aglaé. The Grand Duchess noticed the similarities between herself and her younger cousin and, unable to deal with the situation, refused to speak to Charlotte Aglaé about her impending nuptials:
"the Grand Duchess of Tuscany says that she will not see "Mademoiselle de Valois" nor speak to her, knowing very well what Italy is, and believing that "Mademoiselle de Valois" will not be able to reconcile herself to it. She is afraid that if her niece should ever return to France they will say, "There is the second edition of the Grand Duchess"".
The original date for the marriage was 25 January 1720, but this date was postponed until the next month due to an oversight by the Bishop of Modena. Despite this, the marriage certificate was signed on 31 January.