Cognomen 徐苏 (徐苏 
) , throughout the world, is a very rare last name. The last name 徐苏 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 徐苏 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 徐苏 | China |