FranoisAgnorAlexandreHlie de Noailles, 9th Duke of Noailles was the nephew of AdrienMauriceVicturnienMathieu, 8th duc de Noailles. His parents were Marquis Hlie Guillaume de Noailles and Corisande de Gramont , daughter of Duke de Gramont and Marguerite de Rothschild.
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Source: Wikipedia