Louise Marie Madeleine Fontaine
Louise de Fontaine was born in Paris, in the parish of Saint-Roch, on 28 October 1706. Her baptism act was as follows:
Louise de La Fayette
Louise was one of the fourteen children of Jean comte de La Fayette, and Marguerite de Bourbon-Busset. She was born in Amathay-Vésigneux. Her mother was a member of House Bourbon-Busset an illegitimate branch of the royal House of Bourbon. Her sister-in-law was Madame de La Fayette (1634–1693) the author of "La Princesse de Clèves", France's first historical novel and one of the earliest novels in literature.