Family name Качанаускас (Качанаускас 
) , in all the world, is a very rare last name. The cognomen Качанаускас is characteristic of Eastern Europe, particularly Ukraine, where it is an extremely rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Качанаускас | Russia, Ukraine |
Kachanauskas, and Kačanauskas