Charles Arthur Tristan Languedoc de Noailles, 6th prince de Poix, from (1819) 3rd Spanish duc de Mouchy, 2nd French duc de Mouchy, and duc de Poix, (born 15 February 1771 - 2 February 1834) was a French nobleman.

Son of Philippe Louis de Noailles

Philippe Louis de Noailles

Philippe-Louis-Marc-Antoine, comte de Noailles, prince-duc de Poix, and 2nd Spanish and 1st French duc de Mouchy , was a French soldier, and politician of the Revolution....

 (1752–1819), duc de Mouchy, and the duchesse Anne Louise Marie de Beauvau, Mademoiselle de Beauvau (1750–1834) (daughter of Charles Just de Beauvau and Marie Charlotte de la Tour d'Auvergne

Marie Charlotte de La Tour d'Auvergne

Marie Charlotte de La Tour d'Auvergne was a French noblewoman and member of the House of La Tour d'Auvergne. Married into the House of Beauvau, a powerful family originating in Anjou, she had a daughter aged twenty and died of smallpox at the age of thirty three...

), he was married in 1790, to Nathalie Lucie Léontine de Laborde (1774–1835), daughter of the financier Jean-Joseph de Laborde

Jean-Joseph de Laborde

- Biography:Laborde was born near Jaca in Aragon, into a modest béarnaise family. When he reached adolescence he joined his uncle, who was head of a maritime import-export company at Saint-Jean-de-Luz, and took over as head of the business on the cousin's death...

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They had a daughter, Rosalie Charlotte Antoinette Léontine de Noailles (1797–1851) who married (in 1809) Alfred de Noailles (1784–1812), vicomte de Noailles, son of Louis Marc Antoine de Noailles.