Antoine Charles de Gramont, 3rd Duke of Gramont (1641 - 25 October 1720) was a French nobleman comte de Guiche, comte de Louvigny, Souverain de Bidache who served as a diplomat. His senior title was Duke of Gramont.
He was the youngest son of Antoine III de Gramont and Françoise-Marguerite du Plessis de Chivré (d. 2 May 1689), Cardinal Richelieu's niece.
He distinguished himself in the King's armies during the campaign against Holland in 1672 and during the Siege of Besançon (1674) in the Franco-Dutch War. Later he was Ambassador extraordinary in Spain, Viceroy of Navarre and Béarn, and governor of Bayonne.<br> He was a Knight of the King's order and Knight of the Golden Fleece.
In 1668 he married Marie Charlotte de Castelnau (1648 â 29 January 1694), daughter of Marshal Castelnau.<br> They had two children :
After his wife died, he married Anne Baillet de La Cour (1665-1737) in 1710. They had one child: