 César Chesneau Dumarsais

César Chesneau, sieur Dumarsais or Du Marsais (July 17, 1676 – June 11, 1756) was a French "philosophe", grammarian and contributor to the Encyclopédie ou Dictionnaire raisonné des sciences, des arts et des métiers".He was a prominent figure in what became known as the Enlightenment, and contributed to Diderot's "Encyclopédie".