Grand Duchess Anna Petrovna of Russia

Grand Duchess Anna Petrovna of Russia, Tsesarevna of Russia was the elder daughter of Emperor Peter I of Russia and Empress Catherine I of Russia. Her sister, Elizabeth of Russia, ruled as Empress between 1741 and 1762. While a potential heir in the reign of her father and her mother, she never acceded to the throne due to political reasons. However, her son Peter would rule as Emperor in 1762, succeeding Elizabeth. She was the Duchess of SchleswigHolsteinGottorp by marriage.

Anna was born out of wedlock, although her parents were married in 1712 and she was later legitimized. Her earlier illegitimacy would pose great challenges for her marriage.

Source: Wikipedia