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Last name Guillermo Alvaro (Guillermo Alvaro
) , all over the world, is a very rare surname. The cognomen Guillermo Alvaro is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname. More frequently, Guillermo Alvaro is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Guillermo Alvaro | Costa Rica, Spain, Ecuador, Chile, Peru |
Salas, Manrique, Gonzalez, Pinto Jara, and Salas Guerra