Last name Olšauskas (Olšauskas 
) , in the entire world, is a very rare family name. The cognomen Olšauskas is characteristic of Northern Europe, particularly Lithuania, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Olšauskas | Lithuania |
|
konstantinas olšauskas LT (b. 1867) |
|
| antanas olšauskas LT (b. 1863) |
|
|
| juozas olšauskas LT (b. 1907) |
|
|
| kazimieras olšauskas LT (b. 1911) |
|