Family: Philippe Raoul Yvon Le Mercier du Quesnay / Marie Louise Valarie Le Mercier Duquesnay (F8737)
m. 21 Nov 1901
The parent family of Marie Olga Le Mercier du Quesnay is the Birth Family.
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 | Marie Charles Lemercier Duquesnay (1837-1900)
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 | Louise Angela Desforges (1838- )
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| Charles Lemercier Duquesnay (1861- )  |
| Maurice Eugene Le Mercier du Quesnay (1863- ) |
| Fernand Lemercier Duquesnay (1867- ) |
| Gaston Joseph Lemercier Duquesnay (1870- ) |
| Charles Albert Le Mercier du Quesnay (1855- )
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| Philippe Raoul Yvon Le Mercier du Quesnay (1875-1940)
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| Amélie Yvonne Le Mercier du Quesnay (1907-1996) |
| Marie Olga Le Mercier du Quesnay (1910-1991) |
| Marie Louise Valerie Le Mercier du Quesnay (1912-2011) |