Last name Gajuk (Gajuk 
, Гаюк 
) , in the world, is a rare surname. The last name Gajuk is characteristic of Eastern Europe, particularly Ukraine, where it is a rare surname, Belarus, and Poland, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Eastern Europe, particularly Ukraine, Russia, and Belarus. Much less frequently, Gajuk is the forename as well as the last name.