Family name Alfonsso (Alfonsso 
) , globally, is a very rare last name. The cognomen Alfonsso is characteristic of Spain, where it is a very rare surname, Colombia, and Brazil, where it is an extremely rare surname. Very seldom, Alfonsso is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Alfonsso | Spain, Mexico, Colombia, United States, Brazil |