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