Across the world, 徐凡 (徐凡 
) is a very rare male given name. The given name 徐凡 is habitual in Eastern Asia, particularly China, where it is an extremely rare boy's name. Very seldom, 徐凡 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 徐凡 | China |