| Children |
| | 1. Adolfe Le Mercier Duquesnay, b. 18 Feb 1869, Kingston, Jamaica  d. Dec 1870, Kingston, Jamaica (Age 1 year) |
| | 2. George Aloysius Le Mercier Duquesnay, b. 9 Jul 1870, Kingston, Jamaica d. 22 Jul 1892, Kingston, Jamaica (Age 22 years) |
| | 3. Phillip Joseph Le Mercier Duquesnay, b. 21 May 1872, Kingston, Jamaica d. 15 Apr 1906, Kingston, Jamaica (Age 33 years) |
| | 4. Charles Ulysse Le Mercier du Quesnay, b. 25 Dec 1873, Kingston, Jamaica, Caribbean d. 6 Jan 1938, Kingston, Jamaica (Age 64 years) |
| | 5. Henry Percival Le Mercier Duquesnay, b. 6 Nov 1876, Kingston, Jamaica d. 10 Jul 1913, Saint Andrew, Jamaica (Age 36 years) |
| | 6. Vincent Le Mercier du Quesnay, b. 11 Jul 1877, Kingston, Jamaica |
| | 7. Thomas D'Aquin Le Mercier Duquesnay, b. 26 Jul 1879, Kingston, Jamaica, Caribbean d. Dec 1935, Kingston, Jamaica (Age 56 years) |
| | 8. Francis Theodore Le Mercier Duquesnay, b. 24 Oct 1881, Kingston, Jamaica d. 12 Aug 1935, Kingston, Jamaica (Age 53 years) |
| | 9. Louis John Le Mercier du Quesnay, b. 16 Sep 1883, Kingston, Jamaica d. Dec 1953, Saint Andrew, Jamaica (Age 70 years) |
| | 10. Joseph Laurent Le Mercier Duquesnay, b. 10 Jul 1885, Kingston, Jamaica d. Nov 1944, Jamaica (Age 59 years) |
| | 11. Theodore Paul Lemercier Duquesnay, b. 10 Jul 1885, Kingston, Jamaica d. Nov 1957 (Age 72 years) |
|
1846 - 1909 (63 years)