Aglaé de Polignac

[1] Her paternal grandparents were Marquis Louis Héracle Melchior de Polignac (1717–1792) and his wife, Diane Marie Adelaide Zephirine Mazzarini-Mancini (1726–1755).

Her maternal grandparents were Jean François Gabriel, comte de Polastron, and his wife, Jeanne Charlotte Hérault.

Aglaé Louise was born at the Château de Versailles in Paris, France, the eldest child and only daughter of the Duke and Duchess of Polignac.

Her daughter Corisande Armandine Léonie Sophie de Gramont married Charles Bennet, 5th Earl of Tankerville, and another daughter, Aglaé Angélique Gabrielle de Gramont, was married in turn to Russian general Alexander Lvovich Davydov and French diplomat Horace Sébastiani.

In 1794, according to The Memoirs of Madame Vigée Lebrun, Marie-Élisabeth-Louise Vigée-Le Brun painted a half-length portrait of the Duchess de Guiche wearing a blue turban, in Directoire style.