Duke of Finland
Grand Duke of Finland, alternatively the Grand Prince of Finland (, , ), was, from around 1580 to 1809, a title in use by most Swedish monarchs. Between 1809 and 1917, it was the official title of the ruler of the autonomous Grand Principality of Finland, who was also the Emperor of Russia. The anachronistic female form of the title in English would be "Grand Duchess of Finland" (, ). The only women to have used the title were the Swedish queens regnant Kristina and Ulrika Eleonora. A few crown princes of Sweden also were called "Grand Duke of Finland".