Cognomen Мецаев (Мецаев 
, Metsaev 
, Metsayev 
) , in the entire world, is a very rare family name. The family name Мецаев is characteristic of Russia, where it is a very rare surname, Israel, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Мецаев | Russia |
| Metsaev | United States, Russia |
| Metsayev | Israel |