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Igor (Russian: Игорь, IPA: /ˈiɡərʲ/; Ukrainian: Ігор (Ihor); Belarusian: Ігар (Ihar), IPA: /ˈiɣar/) is a given name derived from the Norse name Ingvar, that was brought to ancient Rus' by the Norse Varangians, in the form Ingvar or Yngvar. Igor (son of the Varangian chief Rurik) conquered Kiev.
The name Igor's association with hunchbacked assistants has its origins in the Universal Studios horror films of the 1930s. See Igor (fictional character).
- Igor of Kiev, ruler of Kievan Rus' from 913 to 945
- Igor II of Kiev (died 1147), Grand Prince of Kiev (1146)
- Igor the Assassin, name given to one of the alleged assassins of Alexander Litvinenko
- Igor Akinfeev (born 1986), Russian football goalkeeper
- Igor Andreev (born 1983), Russian tennis player
- Igor Antón (born 1983), Basque / Spanish cyclist
- Igor Bobček (born 1983), Slovak ice hockey defenceman
- Igor Cavalera (born 1970), Brazilian musician
- Igor González de Galdeano (born 1973), Basque cyclist
- Igor Kunitsyn (born 1981), Russian tennis player
- Igor Kurnosov (1985–2013), Russian chess grandmaster
- Igor Larionov (born 1960), Soviet and Russian retired ice hockey player
- Igor Nikitin (1966–2013), Russian ice hockey player
- Igor Olshansky (born 1982), Ukrainian-born American National Football League player
- Igor Severyanin (1887–1941), Russian poet
- Igor Sijsling (born 1987), Dutch tennis player
- Igor Sikorsky (1889–1972), Russian American pioneer of aviation in both helicopters and fixed-wing aircraft
- Igor Stravinsky (1882–1971), Russian composer
- Igor Svyatoslavich (1151–1201/1202), Russian prince