Cognomen Cazacioc (Козачок 
, Cazacioc 
) , throughout the world, is quite a common surname. The family name Cazacioc is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common surname, Moldova, where it is quite a rare surname, and Belarus. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Ukraine, Russia, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Козачок | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Cazacioc | Romania, Spain, Moldova, United States, Greece |