Mazurenko, Semen [Мазуренко, Семен], b 1879 in Kryvorizhia, Oblast of the Don Cossack Host, d ? Political activist; brother of Vasyl Mazurenko and Yurii Mazurenko. An activist of the Revolution of 1905, he helped organize the All-Russian Peasant Union. In 1906 he was arrested and sentenced to imprisonment and internal exile. He returned to Ukraine in 1917 and became active in the Ukrainian Social Democratic Workers' party. At the beginning of 1919 he headed a special diplomatic mission of the Ukrainian National Republic to Moscow to normalize relations with Bolshevik-ruled Russia. He was arrested in Ukraine by the Soviets in 1925 and was probably executed.
[This article originally appeared in the Encyclopedia of Ukraine, vol. 3 (1993).]