Family name Voyko (Войко 
, Voyko 
, Воыко ) , all around the world, is a rare last name. The family name Voyko is characteristic of Bulgaria, where it is quite a rare surname, Ukraine, and Latvia, where it is a rare surname. Not in comparison with a country's population, the name is most common in Eastern Europe, particularly Ukraine, Russia, and Bulgaria. Much less frequently, Voyko is the forename as well as the last name.