Surname Иваско (Ivasko 
, Иваско 
) , across the world, is a rare cognomen. The surname Иваско is characteristic of Lithuania, where it is quite a rare surname, Slovakia, and Hungary. Much less frequently, Иваско is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ivasko | Romania, Brazil, Hungary, Lithuania, Slovakia |
| Иваско | Russia |