Boris Thomashefsky was born on May 12, 1868 in Kiev, Russian Empire. He was an actor and writer, known for Bar-Mitzvah (1935), Hear Ye, Israel (1915) and The Period of the Jew (1915). He was married to Bessie Baumfeld-Kaufman (actress). He died on July 9, 1939 in New York City, New York, USA.