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Marguerite Françoise de Buffon
Born	1767 (1767) France
Died	1808 (aged 40–41) England
Nationality	French
Other names	French noble
Spouse	Wife of Georges Louis Marie Leclerc de Buffon
Partner	Mistress of Louis Philippe II, Duke of Orléans
Children	Victor du Buffon
Parents	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]

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