Cognomen أعين (Ayun 
, أعين, A'Yan 
) , globally, is quite a common last name. The surname أعين is characteristic of Indonesia, where it is quite a rare surname, Malaysia, and Saudi Arabia, where it is a rare surname. Not in comparison with a country's population, it is commonest in South-eastern Asia, particularly Indonesia, Malaysia, and Philippines. Also, أعين is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ayun | Malaysia, Saudi Arabia, Indonesia, South Korea, Philippines |
| A'Yan | Turkey |