Surname Dunko (Dunko 
, Дунько 
, Дунко ) , in the entire world, is a rare cognomen. The family name Dunko is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Slovakia, where it is a rare surname, and Czechia. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Russia, Belarus, and Ukraine. Very seldom, Dunko is the forename as well as the last name.