In the world, Humberto Guillermo (Humberto Guillermo 
) is a rare masculine first name. The first name Humberto Guillermo is characteristic of Latin America and the Caribbean, particularly Chile, where it is quite a rare male name, and Peru, where it is a rare boy's name. Very seldom, Humberto Guillermo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Humberto Guillermo | Mexico, Argentina, Peru, Ecuador, Chile |