Family name Ун (Un 
, Ун 
) , all around the world, is a common surname. The surname Ун is habitual in Macao, where it is a common surname, Malaysia, where it is quite a rare surname, and Albania. Not in comparison with a country's population, this name is the most popular in Indonesia, Macao, and Malaysia. Likewise, Ун is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Un | Taiwan, Macao, Indonesia, Japan, Malaysia |
| Ун | Ukraine, Kazakhstan, Russia, Armenia, Kyrgyzstan |