In the world, Alfonso Isaac (Alfonso Isaac 
) is a very rare masculine first name. The forename Alfonso Isaac is characteristic of Latin America and the Caribbean, particularly Chile, where it is a rare masculine name, and Peru, where it is a very rare male name. Very seldom, Alfonso Isaac is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Alfonso Isaac | Mexico, Spain, Peru, Ecuador, Chile |