Vladimir Ivanovich Narbut (Russian: Владимир Иванович Нарбут ; Ukrainian: Володи́мир Іва́нович На́рбут ) (1888–1938) - Russian poet of Ukrainian descent, and member of the Acmeist group, brother of Ukrainian artist and graphic designer Georgy Narbut.
Yuri II (Russian: Ю́рий–II ), also known as George II of Vladimir or Georgy II Vsevolodovich (11894 March 1238), was the fourth Grand Prince of Vladimir (1212–1216, 1218–1238) who presided over Vladimir-Suzdal at the time of the Mongol invasion of Russia.
Ivan Ivanovich Ivanov (Russian: Иван Иванович Иванов ; 11 August 1862 – 17 December 1939) was a Russian-Soviet mathematician who worked in the field of number theory.
 Together with Georgy Voronoy he continued Pafnuty Chebyshev's work on the subject.
In mathematics, a Voronoi formula is an equality involving Fourier coefficients of automorphic forms, with the coefficients twisted by additive characters on either side.
 It can be regarded as a Poisson summation formula for non-abelian groups.
 The Voronoi (summation) formula for GL(2) has long been a standard tool for studying analytic properties of automorphic forms and their "L"-functions.
 There have been numerous results coming out the Voronoi formula on GL(2).
 The concept is named after Georgy Voronoy.
The Fyodorov–Shpagin Model 1922 was an experimental twin barrel machine gun of Russian origin.
 It was designed by Vladimir Fyodorov and Georgy Shpagin and was chambered in 6.5×51mm Fyodorov.
The White Poodle (Russian: Белый пудель , "Belyy pudel " ) is a 1956 Soviet film directed by Marianna Roshal and Vladimir Shredel.
 The screenplay was adapted by Grigorii Grebnev from the Aleksandr Kuprin story of the same name.
 The main roles were played by Viktor Koltsov and Vladimir Polyakov, with others taken by Natalie Gitserot, Alexander Antonov and Georgy Millyar.
 Filmed in 1955, it was released in October 1956.
Georgy Feodosevich Voronoy (Ukrainian: Георгій Феодосійович Вороний ; Russian: Гео́ргий Феодо́сьевич Вороно́й ; 28 April 1868 – 20 November 1908) was a Russian and Ukrainian mathematician.
 Among other things, he defined the Voronoi diagram.
Aleksandr Grigoryevich Mazur (Russian: Александр Григорьевич Мазур , 30 August 1913 – 16 December 2005) was a heavyweight Greco-Roman wrestler from Ukraine who won a world title in 1955, aged 42.
 He retired the same year and between 1955 and 1990 coached wrestlers at his sports society CSKA Moscow.
 His trainees included Aleksandr Yurkevich, Anatoly Kolesov, Yury Kozin, Anatoly Kirov, Georgy Vershinin, Vladimir Novokhatko and Valery Anisimov.
Vladimir Vlasov (25 December 1902 (OS)/7 January 1903 (NS) Moscow – 7 September 1986 Moscow) was a Russian composer and conductor.
 He studied at the Moscow Conservatory from 1924 to 1931 under such teachers as Georgy Catoire, Abram Yampol′sky, and Nikolai Zhilyayev.
 In 1936 he founded the Music and Drama Theatre in Frunze, working as the company's artistic director until 1942.
 He worked as the artistic director of the Moscow PO from 1942 to 1949.
 He was made a People’s Artist of the RSFSR and of the Kirghiz SSR.
Vladimir Berkovich is a mathematician at the Weizmann Institute of Science who introduced Berkovich spaces. His Ph.D. advisor was Yuri I. Manin.
 Berkovich was a visiting scholar at the Institute for Advanced Study in 1991-92 and again in the summer of 2000.

Question: Georgy Voronoy and Vladimir Berkovich, both were of which scholarly occupation?
Answer: mathematician