Philippe François Armand Marie de Noailles

Philippe François Armand Marie de Noailles, Duc de Mouchy, Prince-Duc de Poix (17 April 1922 in Paris – 28 February 2011) was a cadet of the French ducal house of Noailles (created dukes and peers of France in 1663 by Louis XIV), and second in succession to the senior title. He was the eldest son of Henri-Antoine-Marie de Noailles, Duc de Mouchy, Prince-Duc de Poix, and of Marie de La Rochefoucauld. Following his marriage to Joan Dillon, he became managing director of Domaine Clarence Dillon. Together, the couple acquired Château La Mission Haut-Brion, Château Laville Haut-Brion and Château La Tour Haut-Brion.

Philippe was married twice. His first wife was Diane de Castellane (b. Paris 19 February 1927), whom he married in Paris (civ.) 14 April 1948 and (rel.) 20 April 1948 (div. 1974). They had two sons and one daughter.

His second wife was HRH Princess Joan of Luxembourg, née Joan Douglas Dillon (b. New York City, New York, 31 January 1935). She was the widow of Prince Charles of Luxembourg (a son of Charlotte, Grand Duchess of Luxembourg), whom she married at St. Edward's, in Sutton Park, Guildford, Surrey, on 1 March 1967, the former wife of James Brady (New York City, New York, 22 May 1931 – Boston, Suffolk County, Massachusetts, 9 April 1998), son of wealthy Boston stockbroker Frederick S. , Jr. and wife Jane H. Brady, whom she married firstly in Paris on 1 August 1953 and divorced in Washoe County, Nevada, on 12 December 1955 and annulled in Rome on 22 June 1963. She was the daughter of U.S. Treasury Secretary C. Douglas Dillon and his wife, Phyllis Chess Ellsworth. They married at Islesboro, Maine, on 3 August 1978, without issue. By this marriage, the Duc de Mouchy had a stepson and two stepdaughters.