Last name Bernatavichyus (Bernatavichyus 
) , across the world, is an extremely rare family name. The surname Bernatavichyus is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Bernatavichyus | Russia |
Бернатавичюс, and Бернатавічюс