Family name มะซู (Masu 
, มะซู 
) , all over the world, is quite a common last name. The surname มะซู is habitual in Botswana, where it is quite a rare surname, Papua New Guinea, and Italy. In absolute terms, it is commonest in India, Nigeria, and Italy. More frequently, มะซู is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masu | Japan, Italy, India, Myanmar, Nigeria |
| มะซู | Thailand |