Surname Gunchak (Gunchak 
, Гунчак 
) , in the world, is quite a rare last name. The last name Gunchak is characteristic of Ukraine, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Gunchak | Spain, Russia, Ukraine, United States |
| Гунчак | Kazakhstan, Ukraine, Russia |
| mikhail gunchak Ukrainian Righteous Among the Nations, UA (b. 1902) |
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| maria gunchak Ukrainian Righteous Among the Nations, UA (b. 1911) |
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| vasiliy gunchak Ukrainian Righteous Among the Nations, UA (b. 1929) |
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