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