He was the son of Marshal of France Antoine V de Gramont and Marie-Christine de Noailles (1672–1748), daughter of Marshal of France Anne-Jules, 2nd duc de Noailles. He married on 11 March 1720 with Geneviève de Gontaut (1696–1756), daughter of Marshal of France Charles-Armand de Gontaut, duc de Biron (1663–1756), and had three children. He became Duke of Gramont after the death of his elder brother Antoine VI in 1741. He fought the allies again in the Battle of Fontenoy and was killed.
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