Chevalier d'Éon, French diplomat and spy (died 1810)

Charlotte d'Éon de Beaumont or Charles d'Éon de Beaumont, usually known as the Chevalière d'Éon or the Chevalier d'Éon, was a French diplomat, spy, and soldier. D'Éon fought in the Seven Years' War, and spied for France while in Russia and England. D'Éon had androgynous physical characteristics and natural abilities as a mimic and a spy. D'Éon appeared publicly as a man and pursued masculine occupations for 49 years, although during that time, d'Éon successfully infiltrated the court of Empress Elizabeth of Russia by presenting as a woman. Starting in 1777, d'Éon lived as a woman and was officially recognised as a woman by King Louis XVI.