Last name Masac (Masac 
) , in all the world, is a very rare family name. The surname Masac is habitual in Slovakia, where it is quite a rare surname, Israel, where it is a very rare surname, and Honduras. In absolute terms, it is the most numerous in Slovakia, India, and Israel. Much less frequently, Masac is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Masac | Brazil, United States, India, Israel, Slovakia |