Cognomen Aldefonso (Aldefonso 
) , all around the world, is an extremely rare family name. The surname Aldefonso is habitual in Latin America and the Caribbean, particularly Honduras, where it is a very rare surname, and Mexico, where it is an extremely rare surname. More prevalently, Aldefonso is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Aldefonso | Colombia, Philippines, Brazil, United States, Mexico |