According to Count Philibert de Gramont, Antoine's brother, their father, also "Antoine de Gramont", viceroy of Navarre, was a bastard daughter of king Henry IV by Diane d'Andoins, knowns as "La Belle Corisande".
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His younger brother was Philibert, comte de Gramont (1621–1707), renowned for his memoirs describing the love affairs on the English court of Charles II, edited by Antoine Hamilton.
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His father was Antoine II de Gramont, his mother was Louise († 1610), daughter of Marshal Roquelaure (1543–1623).
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His memoirs („Mémoires du maréchal de Gramont“, Paris 1716) were published by his son Antoine Charles IV de Gramont.
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As the Comte de Guiche, he is a major character in Edmond Rostand's Cyrano de Bergerac, where he is depicted at first as vain, lustful, and opportunistic.
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He afterwards served under his elder half-brother, Antoine, marshal de Gramont, and the prince de Condé.