When informed of the accession of Peter III of Russia in 1762, George III said, “Well, there are now nine of us in Europe the third of our respective names”:

• George III, King of England
• Charles III, King of Spain
• Augustus III, King of Poland
• Frederick III, King of Prussia
• Charles Emanuel III, King of Sardinia
• Mustapha III, Emperor of the Turks
• Peter III, Emperor of Russia
• Francis III, Duke of Modena
• Frederick III, Duke of Saxe-Gotha

Such a coincidence was unprecedented in European history.