Antoine Charles de Gramont, 3rd Duke of Gramont

Antoine Charles de Gramont, 3rd Duke of Gramont (1641 - 25 October 1720) was a French nobleman comte de Guiche,  comte de Louvigny, Souverain de Bidachewho served as a diplomat. His senior title was Duke of Gramont.

Early life
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.

Biography
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. He was a Knight of the King's order and Knight of the Golden Fleece.

Personal life
In 1668 he married Marie Charlotte de Castelnau (1648 – 29 January 1694), daughter of Marshal Castelnau. They had two children :
 * Catherine-Charlotte de Boufflers (c. 1670–1739), lady-in-waiting, married Louis François, duc de Boufflers
 * Antoine V de Gramont (1672–1725), 4th Duke of Gramont.

After his wife died, he married Anne Baillet de La Cour (1665-1737) in 1710. They had one child:
 * NN de Gramont (b. 1704 - d. before 1720)