Family name Juan Eugenio (Juan Eugenio 
) , worldwide, is a rare cognomen. The surname Juan Eugenio is habitual in Chile, where it is quite a rare surname, and Spain, where it is a rare surname. More prevalently, Juan Eugenio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Juan Eugenio | Peru, Spain, Chile, Ecuador, Costa Rica |