Family: Thomas D'Aquin Le Mercier Duquesnay / Mary Maude O'Donnell (F8311)
m. 1903
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 | Theodore Lemercier Duquesnay (1846-1909)
|
 | Evelyn Louise D'Aquin (1835-1885) |
| Adolfe Le Mercier Duquesnay (1869-1870) |
| George Aloysius Le Mercier Duquesnay (1870-1892) |
| Phillip Joseph Le Mercier Duquesnay (1872-1906)  |
| Charles Ulysse Le Mercier du Quesnay (1873-1938) |
| Henry Percival Le Mercier Duquesnay (1876-1913) |
| Vincent Le Mercier du Quesnay (1877- ) |
| Francis Theodore Le Mercier Duquesnay (1881-1935) |
| Louis John Le Mercier du Quesnay (1883-1953) |
| Joseph Laurent Le Mercier Duquesnay (1885-1944) |
| Theodore Paul Lemercier Duquesnay (1885-1957) |
| Thomas D'Aquin Le Mercier Duquesnay (1879-1935)
|
| Mary Maude O'Donnell (1879-1962) |
| Dahlia Camilla Le Mercier Duquesnay (1904- ) |
| Carmen Evelyn Le Mercier Duquesnay (1905-1997) |
| Lawrence Seymour Lemercier Duquesnay (1908- ) |
| Vernon Omar Duquesnay (1913-1981) |
