Cognomen Масис (Masis 
, Масис 
, Masys 
) , all around the world, is a common last name. The family name Масис is habitual in Costa Rica, where it is a common surname, Nicaragua, where it is quite a common surname, and Armenia. Very seldom, Масис is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masis | El Salvador, United States, Nicaragua, Georgia, Costa Rica |
| Масис | Russia, Kazakhstan, Armenia, Kyrgyzstan, Belarus |
| Masys | Argentina, Canada, Lithuania, United States, Nicaragua |