Maria Zuzanna Cecylia Pouchin (1814-1847), born in Warsaw, daughter of Konstanty Adam Czartoryski and Maria Dzierżanowska.

On 22 May 1839, in Nice, she married Pierre Ferdinand Achille comte de la Roche Pouchin (1805-1883), son of Count Pierre Guillaume de la Roche Pouchin (1767-1825, Baron of the Empire from 1811) and Marie Agnès Warburge baron d'Eschembrender et de Breilbach. From the marriage were born: Constantin comte de la Roche Pouchin and Fernandine de la Roche Pouchin.

Pierre Ferdinand Achille, her husband, was field marshal (marechal de camp), marquis of Cantelou, viscount of Saint-Sauveur, and chancellor de l'Ordre Militaire de Saint Georges de Luques. He held numerous military and nobility decorations and also served as general chief of staff and chambellan.

Marie died on 15 July 1847 at her residence at Avenue Royale 52 in Paris, aged 33. The death was reported by, among others, Victor de Lopatta, a Polish officer, chief of staff of the Polish Army, resident in Paris at 1 rue Frochat (ADep. Hauts-de-Seine, AD Neuilly-sur-Seine no. 229 of 1847).

She was buried on 18 July 1847 in Paris, in Le Père Lachaise, section R, number on plan 602 (Recueil 1855, p. 134).