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Surname Kosjak (Косяк , Kosjak ) , worldwide, is quite a common cognomen. The family name Kosjak is habitual in Ukraine, where it is quite a rare surname, Belarus, and Kazakhstan. In absolute terms, this name is the most popular in Eastern Europe, particularly Ukraine, Russia, and Belarus.
VARIANT | COUNTRY |
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Косяк | Ukraine, Belarus, Kazakhstan, Russia |
Kosjak | Germany, Austria |