Family name マソ (Maso 
, Mazo , マソ 
) , around the world, is a common surname. The family name マソ is habitual in Colombia, where it is quite a common surname, Paraguay, and Papua New Guinea, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Colombia, Philippines, and Italy. Likewise, マソ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mazo, Maso | Colombia, Philippines, Spain, Italy, India |
| マソ | Japan |
| Masó | Paraguay, Argentina, Spain, Brazil, United States |