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Family name Козак (Kozak
, Kozák
, Козак
) , globally, is a common surname. The last name Козак is habitual in Eastern Europe, particularly Ukraine, where it is quite a common surname, Slovakia, and Czechia (explore the name in all countries). In absolute terms, it is commonest in Ukraine, Poland, and the United States. Also, Козак is the forename as well as the last name.