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