Family name Stefanovsky (Stefanovsky 
, Стефановский 
, Стефановски 
) , all over the world, is a rare cognomen. The last name Stefanovsky is habitual in Eastern Europe, particularly Slovakia, where it is quite a rare surname, Belarus, where it is a rare surname, and Bulgaria. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Russia, Belarus, and Slovakia.
| VARIANT | COUNTRY |
|---|---|
| Stefanovsky | United States, Ukraine, Slovakia |
| Стефановский | Kazakhstan, Russia, Ukraine, Belarus |
| Стефановски | Russia, Bulgaria |
Štefanovský, and Стефановський