Cognomen Mečys (Mečys 
) , all over the world, is an extremely rare family name. Much more frequently, Mečys is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mečys | Lithuania |
Mecislaus, Mecislovas, Mecys, Mečislovas, Mieczyslaw, Mieczysław, Mieszko, Мечислав, Мечыслаў, Мешко, and Мєчислав