Surname Oyunaa (Oyunaa 
) , around the world, is a rare cognomen. The family name Oyunaa is habitual in Mongolia, where it is quite a common surname, South Korea, where it is a rare surname, and Germany, where it is an extremely rare surname. In absolute terms, this name is the most popular in Eastern Asia, particularly Mongolia, South Korea, and China. Likewise, Oyunaa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Oyunaa | Mongolia, South Korea, China, Germany, France |