Cognomen Jacinto Guillermo (Jacinto Guillermo 
) , in the world, is an extremely rare family name. The cognomen Jacinto Guillermo is characteristic of Latin America and the Caribbean, particularly Chile, where it is a very rare surname. Much more prevalently, Jacinto Guillermo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jacinto Guillermo | Spain, Chile, Ecuador, Peru |