Family name Оиуна (Oyuna 
, Оиуна ) , worldwide, is a rare last name. The surname Оиуна is characteristic of Mongolia, where it is quite a rare surname, Turkey, where it is an extremely rare surname, and the United States. More prevalently, Оиуна is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oyuna | Germany, Russia, United States, India, Mongolia |
| Оиуна | Russia |