Rainier III, Prince of Monaco
Princess Charlotte, Duchess of Valentinois (Charlotte Louise Juliette Grimaldi; 30 September 1898 – 16 November 1977), was the daughter of Louis II, Prince of Monaco, and the mother of Rainier III, Prince of Monaco. From 1922 until 1944, she was the Hereditary Princess of Monaco, heiress presumptive to the throne.