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".
Morganatic marriage
In secret marriage, Louis XIV wed his second wife, Madame de Maintenon, in 1683 (she was nearly 50, so no children were likely); Louis the Grand Dauphin wed Marie Émilie de Joly de Choin in 1695; Anne Marie d'Orléans ("La Grande Mademoiselle") wed Antoine, Duke de Lauzun in 1682; and Louis Philippe I, Duke of Orléans wed the Marquise de Montesson in 1773. The mechanism of the "secret marriage" rendered it unnecessary for France to legislate the morganatic marriage "per se". Within post-monarchical dynasties, until the end of the 20th century the heads of the Spanish and Italian Bourbon branches, the Orléans of both France and Brazil, and the Imperial Bonapartes have, in exile, exercised claimed authority to exclude from their dynasty descendants born of unapproved marriages — albeit without calling these marriages "morganatic".