Sophie de Grouchy's first biographer was the civil servant, part-time historian Antoine Guillois. His book, La Marquise de Condorcet, sa famille, son salon, ses amis, portrays Sophie as a 'superior woman' praised for her beauty, her virtue and her intellect. Guillois dedicates his work to Sophie's grand nephew, the Vicomte de Grouchy.
Olympe de Gouges also had a biographer named Guillois, a young medical student who chose to write his thesis on women's psychology during the revolution, focusing on one case, a woman clearly suffering from paranoid delusions, according to his expert diagnostic.
Would it be too much of a coincidence if the two Guillois were related? It's by no means an uncommon name. In fact, in my searches, I discovered some Guillois of that period based in Turkey! But as it turns out, they are father and son, and here's the evidence on Guillois Junior's birth certificate (courtesy of a Guillois descendant , Jacques le Normand.