Cognomen מזאי (Mezei 
, Mezey 
, מזאי 
) , in the entire world, is a common surname. The family name מזאי is habitual in Eastern Europe, particularly Hungary, where it is quite a common surname, Romania, and Slovakia. Very seldom, מזאי is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mezei | Serbia, Romania, United States, Slovakia, Hungary |
| Mezey | Romania, United States, Germany, Slovakia, Hungary |
| מזאי | Israel |