Family name Gary Guillermo (Gary Guillermo 
) , in the entire world, is an extremely rare cognomen. The surname Gary Guillermo is characteristic of Latin America and the Caribbean, particularly Chile, where it is a very rare surname. More prevalently, Gary Guillermo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gary Guillermo | Peru, Philippines, Ecuador, Chile |