Family name Marcelo Octavio (Marcelo Octavio 
) , in all the world, is a rare cognomen. The surname Marcelo Octavio is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname. More prevalently, Marcelo Octavio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marcelo Octavio | Argentina, Peru, Ecuador, Spain, Chile |