Grigor Mikhailovich Tyutyunnik (Ukrainian Grigіr Mikhailovich Tyutyunnik; 1931-1980) - Soviet Ukrainian writer. The younger half-brother of the writer Grigory Tyutyunnik. The novel "Whirlpool" tells about the life of the Ukrainian village in the pre-war decade and about the struggle of the people against the Nazi invaders during the Great Patriotic War of 1941-1945.