He was born at Versailles in 1707 to Louis de Pardaillan de Gondrin, marquis de Gondrin, and his wife, Marie Victoire de Noailles, one of the 20 children of Anne Jules de Noailles and Marie Françoise de Bournonville. His father was a member of the House of Pardaillan de Gondrin, an old noble family of Gascon origin.
The elder of two children, Louis was known as the marquis de Gondrin from 1712 when his father died unexpectedly at the age of 23. Louis"s mother was remarried on 2 February 1723 to Louis Alexandre de Bourbon, Count of Toulouse, the youngest child of Louis XIV and Louis"s great-grandmother Louisiana Montespan, in a secret ceremony. The marriage was announced only after the death of the Régent in December of the same year.
As such, his half-brother was Louis Jean Marie de Bourbon, the duc de Penthièvre and single richest man in France prior to the revolution.
Julie Sophie Gillette de Pardaillan de Gondrin (1 October 1725–1797), Abbess of Fontevraud (1765–1792), never married;
Louis de Pardaillan de Gondrin (15 February 1727-1714 September 1757), died unmarried;
Marie Françoise de Pardaillan de Gondrin (13 August 1728–1764), married François Emery de Durfort, Count of Civrac, had issue;
Julie Magdeleine Victoire de Pardaillan de Gondrin (20 March 1731-1713 September 1799), married François Emmanuel de Crussol, Duke of Uzès and had issue. Present Dukes of Uzès descend from Julie.
