Cognomen سيراس (Cyrus 
, Seras 
, Sierras 
) , in the entire world, is a common surname. The surname سيراس is characteristic of Latin America and the Caribbean, particularly Grenada, where it is a common surname, Saint Vincent and the Grenadines, and Barbados, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it is the most numerous in the United States, Kenya, and Uganda. More prevalently, سيراس is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cyrus | Hong Kong, Philippines, Democratic Republic of the Congo, United States, Kenya |
| Seras | Germany, Mexico, India, Philippines, United States |
| Sierras | Spain, Mexico, Canada, Philippines, United States |