Throughout the world, Marcelo Sergio (Marcelo Sergio 
) is a rare masculine forename. The forename Marcelo Sergio is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare masculine name, and Peru, where it is a very rare male name. Very seldom, Marcelo Sergio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Marcelo Sergio | Brazil, Ecuador, Peru, Chile, Argentina |