Surname Eldefonzo (Eldefonzo 
) , across the world, is an extremely rare cognomen. The cognomen Eldefonzo is habitual in Latin America and the Caribbean, particularly Honduras, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. More prevalently, Eldefonzo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Eldefonzo | Honduras, Venezuela, United States, Philippines |