Maternal grandmother of Rainier III, Prince of Monaco
Marie Juliette Louvet
Marie Juliette Louvet was the lover of the then unmarried Prince Louis II of Monaco and was the mother of his only child, Princess Charlotte of Monaco. Known as Juliette, Louvet was the daughter of Jacques Henri Louvet and his first wife, Joséphine Elmire Piedefer. She married photographer Achille Delmaet, but they divorced in 1893. They had two children, Georges and Marguerite.