Cognomen 徐亚 (徐亚 
) , all over the world, is a very rare family name. The cognomen 徐亚 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 徐亚 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 徐亚 | China |