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 Urusov not representing a distinct existing country. In 2008, Prince Lev Urusov was inducted into the Tennis Hall of Fame of Russia. Reporters were informed that no relatives of Lev Urusov remained in Russia and that his award will wait in Russia till his relatives abroad claim it. Lev Urusov Prince Lev Vladimirovich Urusov (, , , Saint Petersburg — , Paris) was a Russian diplomat. From 1910 until his death, he was a member of International Olympic Committee. Lev Urusov was born in the family of State Councillor and Chamberlain Vladimir Pavlovich Urusov. In 1898 he graduated from Alexandrovski Lyceum