Tsarevich Simeon Alexeyevich (Russian: Симеон Алексеевич; 3 April 1665 - 18 June 1669) was the fourth son of Tsar Alexis of Russia and Maria Miloslavskaya, brother of Tsar Feodor III of Russia and Tsar Ivan V of Russia and half-brother of Tsar Peter the Great.

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