Across the world, 孟蔚 (孟蔚 
) is a very rare epicene first name. The given name 孟蔚 is habitual in Eastern Asia, particularly China, where it is an extremely rare gender-neutral name. Very seldom, 孟蔚 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 孟蔚 | China |