Henri, marquis de Saint-Nectaire was a French nobleman, soldier and diplomat. The Marquis de Saint-Nectaire was commissioned in the Senneterre Dragoons, advancing to the rank of Brigadier in 1704 and Maréchal de camp later the same year. He was promoted Lieutenant-General of the French Army in 1718, before being posted to London by King Louis XV, where he served as Ambassador to Great Britain until 1720; he was appointed Chevalier du Saint-Esprit in 1724.