Пётр III
Grand Duchess Natalya Alexeyevna of Russia (; 21 July 1714 – 22 November 1728) was a Russian Grand Duchess. She was the elder sister of Emperor Peter II of Russia, a maternal first cousin of Holy Roman Empress Maria Theresa I, and Charles I, Duke of Brunswick-Wolfenbüttel. She was also a paternal first cousin of Peter III of Russia.