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 | Costa Rica, El Salvador, Nicaragua, Georgia, United States |
| Масис | Kyrgyzstan, Russia, Belarus, Kazakhstan, Armenia |
| Masys | Nicaragua, Canada, Argentina, Lithuania, United States |