Last name Kwascha (Кваша 
, Kwascha 
) , globally, is quite a common surname. The last name Kwascha is habitual in Eastern Europe, particularly Ukraine, where it is quite a common surname, Russia, where it is quite a rare surname, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Кваша | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Kwascha | Germany, United States |