Surname Иванаускас (Ivanauskas 
, Иванаускас 
) , all over the world, is quite a rare cognomen. The cognomen Иванаускас is habitual in Lithuania, where it is quite a common surname, Paraguay, where it is quite a rare surname, and Cyprus. In absolute terms, it most frequently occurs in Lithuania, Paraguay, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Ivanauskas | United Kingdom, United States, Lithuania, Paraguay, Canada |
| Иванаускас | Lithuania, Russia, Kazakhstan, Belarus |
|
иванаускас, тадас леонардович Lithuanian ornithologist, LT (b. 1882) |
|
|
иванаускас, вальдас вацлавич Lithuanian footballer, LT (b. 1966) |
|
| иванаускас, йонас Lithuanian priest, LT (b. 1960) |
|