Cognomen Sixto Leonardo (Sixto Leonardo 
) , all over the world, is an extremely rare surname. The surname Sixto Leonardo is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare surname. Predominantly, Sixto Leonardo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sixto Leonardo | Spain, Argentina, Peru, Chile, Ecuador |