Last name Рунчак (Рунчак 
) , around the globe, is a very rare family name. The surname Рунчак is characteristic of Eastern Europe, particularly Ukraine, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Рунчак | Ukraine |
| рунчак володимир петрович Ukrainian accordionist, conductor and composer, UA (b. 1960) |
|