Boris Valentinovich Volynov (Russian: Бори́с Валенти́нович Волы́нов; born 18 December 1934) is a Soviet cosmonaut who flew two space missions of the Soyuz programme: Soyuz 5, and Soyuz 21. Following the death of Alexei Leonov in October 2019, he is the last surviving member of the original group of cosmonauts. He is also considered to be the first Jew in space.