Cognomen Янушкевичус (Янушкевичус 
) , worldwide, is a very rare surname. The cognomen Янушкевичус is habitual in Eastern Europe, particularly Belarus, where it is a very rare surname, Russia, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Янушкевичус | Ukraine, Russia, Belarus |