Cognomen Guillermo Alexis (Guillermo Alexis 
) , in the entire world, is a rare family name. The cognomen Guillermo Alexis is characteristic of Chile, where it is quite a rare surname, and Spain, where it is a very rare surname. More frequently, Guillermo Alexis is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guillermo Alexis | Peru, Spain, Chile, Ecuador, Costa Rica |