Cognomen Bychok (Bychok 
, Бычок 
, Бичок 
) , around the globe, is quite a rare surname. The cognomen Bychok is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, where it is a rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Bychok | Canada, United States, Russia, Czechia, Italy |
| Бычок | Russia, Kazakhstan, Belarus |
| Бичок | Russia, Ukraine |
| Бышок | Russia, Belarus |