Surname Бычак (Бычак 
) , in the entire world, is a very rare last name. The last name Бычак is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Бычак | Russia |
| анатоль мікалаевіч бычак BY (b. 1940) |
|