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