Aglaé-Angélique-Gabrielle de Gramont (Versailles 1787-Paris 1842) was the daughter of Antoine-Louis-Marie Comte de Gramont, Duc de Guiche, and his wife Louise-Gabrielle-Aglaé de Polignac. She lost her mother as a young girl and emigrated with her father to Russia where she lived in the same Palace as the Comte de Provence, future King Louis XVIII. She was a friend of Madame Royale and later also of Pushkin. In Mitau, August 1804, she married the Colonel Alexander Lvovitch Davydov (1773-1833) with whom she had a son, Vladimir and two daughters, Adèle and Catherine who became the Marquise de Gabriac. After the death of her husband, Aglaé returned to France and remarried to the Maréchal Comte Sébastiani (1772-1851) and thus became the step-mother of the famous Duchesse de Choiseul-Praslin who was merciless strangled by her notorious husband.