He was born in Paris to one of the most illustrious families of the old noblesse, a cadet branch of the viscounts of Aure, which took its name from the Seignory of Gramont in Navarre.
Ia lahir di Paris dari salah satu keluarga paling diilustrasikan dari bangsawan lama, sebuah cabang kadet dari para viscount Aure, yang mengambil namanya dari Seignory dari Gramont di Navarre.