Cognomen Зая (Zaya 
, Zaia 
, Зая 
) , around the world, is a common surname. The cognomen Зая is characteristic of Mongolia, where it is quite a common surname, Myanmar, and Albania. Measured by absolute frequency, it most frequently occurs in Myanmar, Mongolia, and Argentina. Likewise, Зая is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Zaya | Brazil, Mongolia, Myanmar, Argentina, United States |
| Zaia | Brazil, Myanmar, Argentina, United States, Italy |
| Зая | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| Zaja | Brazil, Argentina, Albania, United States, Italy |