Lev Kamenev arrested in 1902, ending his formal education. From that point on, he worked as a professional revolutionary, and was active in the capital St. Petersburg, Moscow and Tiflis. He adopted the surname Kamenev during this period. In the early 1900s, he married Olga Bronstein, a fellow Marxist (and younger sister of Leon Trotsky, who had also adopted a different surname). The couple had two sons together. Kamenev joined the Communists in 1901. He took a brief trip abroad in 1902, meeting Russian social democratic leaders living in exile, including Vladimir Lenin, whose adherent and close associate he became. He also
Lev Philippovitch Wolkenstein Alexis Wolkenstein, his son, Pierre Wolkenstein and Marie-Sophie Wolkenstein, his grand children and Paul, Louis, Héloïse and Simon Wolkenstein, his great grand children living in Paris. Lev Philippovitch Wolkenstein Lev Philippovitch Wolkenstein (, 1858—20.05.1935, Paris) was a Russian jurist, lawyer and cadet. He was born as Isaak-Leib Fishelevich Wolkenstein () at 1858 presumably in Taganrog. Lev Wolkenstein was brother of who also was a Russian lawyer. Lev Wolkenstein studied at Taganrog Classical Male Gymnasium () at the same time as Anton Chekhov. When Chekhov was at seventh grade and Wolkenstein was at undergraduate eighth grade, all students at Wolkenstein's class