Princess Marie Radziwill (born Marie Dorothée Élisabeth de Castellane; 19 February 1840 – 10 July 1915) was a French memoarist and noblewoman, a member of the house of Castellane. The famous dandy Boni de Castellane was her nephew.
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Early life
Marie was born on 19 February 1840 at the Château de Rochecotte. She was the daughter of French aristocrats Henri de Castellane, marquis de Castellane, and Pauline de Talleyrand-Périgord. She had one brother, Antoine de Castellane, who married Madeleine Le Clerc de Juigné and had three children that survived to adulthood, Boniface de Castellane (who married American railroad heiress Anna Gould), Jean de Castellane (who married his cousin Dorothée de Talleyrand-Périgord, the former wife of Prince Charles Egon IV, Prince of Fürstenberg), and Stanislas de Castellane (who married Natalia Terry y Sanchez, sister of architect Emilio Terry).
Her paternal grandparents were Boniface de Castellane, Marshal of France, and Louise Cordélia Eucharis Greffulhe (the sister of French banker and politician Jean-Henry-Louis Greffulhe). Her maternal grandparents were Edmond de Talleyrand-Périgord, the 2nd Duke of Dino, and Princess Dorothea of Courland, the Duchess of Dino.