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