Cognomen Ивась (Ивась 
) , all around the world, is an extremely rare surname. The surname Ивась is habitual in Kyrgyzstan, where it is a very rare surname, and Russia, where it is an extremely rare surname. Much less frequently, Ивась is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ивась | Kyrgyzstan, Russia |