For 10 points, name this victor in the Great Northern War and westernizer of Russia.
This ruler's reign saw a migration led by Nekrasov during the Bulavin Rebellion as well as the rise to power of both Count Golovkin and Peter Tolstoi. Vasily Galitzine controlled power for part of this ruler's early reign after one of two revolts led by this ruler's half-sister Sophia and the Streltsy, whom this ruler would later disband.  This ruler shared power with his retarded half-brother Ivan until that man's death, and he had his son Alexei executed.  He led several expeditions against Azov in order to gain a port on the Black Sea, and likewise fought to gain Baltic Sea possessions from Charles XII.  For 10 points, name this victor in the Great Northern War and westernizer of Russia.
This ruler's reign saw a migration led by Nekrasov during the Bulavin Rebellion as well as the rise to power of both Count Golovkin and Peter Tolstoi.
Peter the Great [or Peter I]