Yakov Yurovsky

Yakov Mikhailovich Yurovsky (Russian: Я́ков Миха́йлович Юро́вский; 19 June 1878–2 August 1938) was an Old Bolshevik best known as the chief executioner of Emperor Nicholas II of Russia, his family, and four retainers on the night of 16/17 July 1918.