Surname Gaiziunas (Gaiziunas 
) , throughout the world, is a very rare cognomen. The last name Gaiziunas is habitual in Lithuania, where it is quite a rare surname, Spain, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Gaiziunas | Spain, Lithuania, United States |