Last name Вайчюнас (Вайчюнас 
, Vaičiūnas 
) , in all the world, is a rare family name. The surname Вайчюнас is habitual in Lithuania, where it is quite a rare surname, Belarus, where it is a very rare surname, and Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Вайчюнас | Russia, Ukraine, Belarus |
| Vaičiūnas | Lithuania |
Vaichiunas, Vaichyunas, and Vaychyunas
|
пятрас вайчюнас Lithuanian librarian, poet and author, LT (b. 1890) |
|