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