OriginsThe Kossack surname is predominantly Ukrainian in origin, as it is closely associated with the historical Cossack communities in Ukraine. However, variations of the surname can also be found in Russia and other Slavic countries.
Geographic DistributionThe Kossack surname is most popular in Ukraine, where it is deeply rooted in the country's history and culture. It may also be found in neighboring countries with Slavic influences, such as Russia, Belarus, and Poland.