Cognomen Jančiauskas (Jančiauskas 
) , all over the world, is a very rare last name. The surname Jančiauskas is habitual in Northern Europe, particularly Lithuania, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jančiauskas | Lithuania |
| vytautas jančiauskas Lithuanian association football player, LT |
|