- Born in 1735
- Deceased on August 22, 1776 in Paris, at Hôtel garni de Pologne, at the approximate age of 40 years
Parents
- René-Claude Robert des Marchais, alias René-Claude Robert (1702 - 1759), écuyer, seigneur des Marchais, conseiller du Roi
- Marie Riollan ( - 1788), dame de La Cailletterie
Family
- Married in 1766, with Marie Marguerite Eléonore Trouillet de l'Echasserie (1749 - 1794), separated, issuing
Marie Renée (1766 - 1786)
Occupations
- conseiller du Roi