Cognomen Cierras (Cierras 
) , globally, is a very rare surname. The cognomen Cierras is habitual in Philippines, where it is a very rare surname, Mexico, where it is an extremely rare surname, and the United States. Very seldom, Cierras is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cierras | Mexico, Brazil, United States, Philippines |