Surname Juan-Guillermo (Juan-Guillermo 
) , throughout the world, is an extremely rare cognomen. The last name Juan-Guillermo is habitual in Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. More prevalently, Juan-Guillermo is the forename as well as the last name. Parts of the name also exists independently as a first name Juan, and a first name Guillermo.
| VARIANT | COUNTRY |
|---|---|
| Juan-Guillermo | Chile |