Louis de Cardevac, marquis d'Havrincourt
Louis de Cardevac, marquis d'Havrincourt was a French nobleman, soldier and diplomat.
Having been promoted Lieutenant-General of the French Army, he was sent as King Louis XV's envoy to London in 1748 before being appointed French Ambassador to Sweden between 1749 and 1763. He was then posted to the Netherlands as French Ambassador.
He married, on 10 June 1737, Antoinette-Barbonne-Thérèse, only child of :da:Jacques-Vincent de Languet de Gergy|Jacques-Vincent de Languet, comte de Gergy, who was French Ambassador to the Doge of Venice. by whom he had four children, including Anne-Gabriel-Pierre de Cardevac, who succeeded him as 2nd Marquis and via his mother as Comte de Gergy etc.
