Save Type Surname Usage Polish, Czech, Slovak, Sorbian, Ukrainian Meaning & History Ethnic name for a Cossack, a member of a people descended from a group of runaway serfs who set up a semi-independent military republic in Ukraine in the 15th and 16th centuries.
Save Type Surname (from nickname) Usage Jewish Meaning & History Nickname from Yiddish kozak from a Ukrainian loanword meaning "warrior", "brave man".