Boris Alexandrov
Борис Александрович Александров
Musical director for the Alexandrov Ensemble after the death of his father [a=Александр Васильевич Александров].
Born August 4th, 1905 in Bologoye, Russian Empire.
Died June 17th, 1994 in Moscow, Russia.
https://en.wikipedia.org/wiki/Boris_Alexandrovich_Alexandrov