Cognomen Iounna (Юнна 
, Iounna 
) , all around the world, is a very rare last name. The last name Iounna is characteristic of Kyrgyzstan, where it is a very rare surname, Russia, where it is an extremely rare surname, and Ukraine. Predominantly, Iounna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Юнна | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| Iounna | United States |