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