Family name Ружаньський (Ружаньський 
) , throughout the world, is an extremely rare last name. The cognomen Ружаньський is habitual in Eastern Europe, particularly Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ружаньський | Ukraine |
Ruzhanskii, Ruzhanskiy, and Ruzhansky