Mstislav Leopoldovich (ˈmɪstɪslɑːv; Russian mstiˈslaf leaˈpɔldavitʃ). 1927–2007, Soviet cellist, composer, and conductor; became a US citizen in 1978 after losing Soviet citizenship (restored in 1990)
Rostropovich in American English
(ˌrɑstrəˈpouvɪtʃ, Russian ʀʌstʀəˈpɔvjɪtʃ)
noun
Mstislav (Leopoldovich) (ˈmɪstəˌslɑːv ˌliəˈpouldəvɪtʃ, Russian mstjɪˈslɑːf ljɪəˈpɔldəvjɪtʃ), 1927–2007, Soviet cellist and conductor (husband of Galina Vishnevskaya)