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