Cognomen Cornelio Leonardo (Cornelio Leonardo 
) , all around the world, is an extremely rare last name. The last name Cornelio Leonardo is habitual in Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. More frequently, Cornelio Leonardo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cornelio Leonardo | Chile, Peru, Ecuador |