Marguerite Françoise de Buffon

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Guillaume François de Cepoy (father)
Élisabeth Amaranthe Jogues de Martinville (mother)

Marguerite Françoise Bouvier de la Mothe de Cepoy (1767–1808), known as Countess de Buffon, was a French noble, known as the royal mistress of Louis Philippe II, Duke of Orléans from 1784 until 1793.^[1]

She was the daughter of marquis Guillaume François de Cepoy and Élisabeth Amaranthe Jogues de Martinville and married count Georges Louis Marie Leclerc de Buffon (1764-1794) in 1784; the same year, she became the lover of Orléans, with whom she had a son, count Victor du Buffon (1792-1812). During the Terror, she helped the legitimate sons of Orléans escape prison. In 1794, she divorced and emigrated to England, where she became a supporter of Louis Philippe.^[1]