In the entire world, Guillermo Israel (Guillermo Israel 
) is a rare male forename. The given name Guillermo Israel is characteristic of Latin America and the Caribbean, particularly Chile, where it is a rare boy's name, and Peru, where it is a very rare male name. Much less frequently, Guillermo Israel is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Guillermo Israel | Spain, Mexico, Chile, Ecuador, Peru |