Surname Masj (Masj 
, มัสยิด 
) , throughout the world, is a very rare last name. The last name Masj is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, Masj is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masj | France, Malaysia |
| มัสยิด | Thailand |