Family name Koshmak (Кошмак 
, Koshmak 
) , globally, is a rare surname. The surname Koshmak is characteristic of Ukraine, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Belarus, where it is a very rare surname. In absolute terms, this name is the most popular in Ukraine, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Кошмак | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Koshmak | Russia, Ukraine, United States |
| konstantin koshmak researcher, ORCID id # 0000-0002-6479-7923 |
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