- Born on April 12, 1729 in Le Caule-Sainte-Beuve
- Deceased on March 7, 1772 in Blangy-sur-Bresle, at the age of 42 years
Parents
- Nicolas David Pierre Le Vaillant (1691 - ), écuyer, sieur de Longdubos
- Magdeleine Angélique de Gouberville (1691 - 1765)
Family
- Married with Marie Anne Suzanne Élisabeth Landier (1738 - 1779), issuing
Marie Anne (1759 - 1853)- Marie Anne (1763 - 1836)