Last name Гердаускас (Гердаускас 
) , across the world, is a very rare cognomen. The family name Гердаускас is habitual in Eastern Europe, particularly Russia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Гердаускас | Russia, Ukraine |
Витас, Игнацас-Эдмундас, and Донатас