He was also a cousin of the marquise de Montespan.
Françoise-Athénaïs, Marchioness of Montespan
Louise Françoise de Bourbon (4 December 1707 – 19 August 1743) was a grand daughter of Louis XIV of France and his mistress Françoise Athénaïs de Rochechouart de Mortemart, better known as Madame de Montespan.
However people would comment: "Madame de Montespan has put on her robe battante, therefore she must be pregnant.".
Françoise-Athénaïs, marquise de Montespan | Marquise | Marquise, Pas-de-Calais | Françoise d'Aubigné, marquise de Maintenon | Marie de Rabutin-Chantal, marquise de Sévigné | Marquise de Sévigné | marquise de Montespan | Joaquina Téllez-Girón, Marquise of Santa Cruz | Catherine de Vivonne, marquise de Rambouillet |