Vladimir Mitrofanovich Purishkevich (Russian: Владимир Митрофанович Пуришкевич, [pʊrʲɪˈʂkʲevʲɪt͡ɕ]; 24 August [O.S. 12 August] 1870 – 1 February 1920) was a Russian politician and right-wing extremist known for his monarchist, ultra-nationalist, antisemitic and anticommunist views.[1][2] He helped lead the paramilitary Black Hundreds during the Russian Revolution of 1905. He later served in the State Duma, where he gained a reputation for courting of public controversy. Together with Felix Yusupov and Dmitri Pavlovich he took part in the assassination of Grigori Rasputin in late 1916.
After the February Revolution, Purishkevich was one of the only leaders of the Black Hundreds to remain politically active. He eventually joined the White movement and died from typhus in 1920.
Britannica
was invoked but never defined (see the help page).