Cognomen Grytsuk (Грицук 
, Grytsuk, Гритсук ) , across the world, is quite a rare family name. The surname Grytsuk is habitual in Belarus, where it is quite a common surname, Russia, where it is quite a rare surname, and Kazakhstan, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Eastern Europe, particularly Belarus, Russia, and Ukraine.