Cognomen มัสสุ (Massu 
, มัสสุ 
) , all around the world, is quite a rare last name. The family name มัสสุ is characteristic of Cameroon, where it is quite a rare surname, France, where it is a rare surname, and Chile. In absolute terms, it is the most numerous in France, Cameroon, and Pakistan. Also, มัสสุ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Massu | France, Pakistan, Cameroon, India, Indonesia |
| มัสสุ | Thailand |