Throughout the world, Marcos Octavio (Marcos Octavio 
) is a rare male forename. The given name Marcos Octavio is characteristic of Latin America and the Caribbean, particularly Chile, where it is a rare boy's name, and Peru, where it is a very rare boy's name. Much less frequently, Marcos Octavio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Marcos Octavio | Mexico, Peru, Ecuador, Spain, Chile |