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