Last name Gil Alfonso (Gil Alfonso 
) , worldwide, is a rare family name. The surname Gil Alfonso is habitual in Cuba, where it is a rare surname, Finland, where it is a very rare surname, and Spain. Not in comparison with a country's population, the name is most common in Cuba, Spain, and Colombia. Much less frequently, Gil Alfonso is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gil Alfonso | Spain, Colombia, Ecuador, Cuba, Peru |