Last name Cornelio Juan (Cornelio Juan 
) , in the entire world, is an extremely rare cognomen. The family name Cornelio Juan is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare surname. More prevalently, Cornelio Juan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cornelio Juan | Peru, Ecuador, Chile, Costa Rica |