Claim: In the premiere of The Merchant Kalashnikov, Tsar Ivan IV was played by Théodore Strawinsky (the father of Igor Stravinsky), and Alyona Dmitriyevna, Kalashnikov's wife, was played by Wilhelmina Raab.
Evidence: Tsar Ivan IV Fyodor Stravinsky 
He was the father of Igor Stravinsky and the grandfather of Théodore Strawinsky and Soulima Stravinsky.