Worldwide, Серо (Sero 
, Серо 
) is quite a rare unisex first name. The forename Серо is habitual in Georgia, where it is quite a rare gender-neutral name, Ethiopia, and Iraq, where it is a rare epicene name. Not in comparison with a country's population, this name is the most popular in Ethiopia, India, and Egypt. Also, Серо is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Sero | Indonesia, Ethiopia, Egypt, India, Benin |
| Серо | Russia, Ukraine |