Surname Dubnyak (Дубняк 
, Dubnyak 
) , around the globe, is a rare cognomen. The family name Dubnyak is habitual in Ukraine, where it is a rare surname, Kazakhstan, and Belarus. Not in comparison with a country's population, this name is the most popular in Ukraine, Russia, and Kazakhstan. Much less frequently, Dubnyak is the forename as well as the last name.