Cognomen Guajardo Fonseca (Guajardo Fonseca 
) , across the world, is an extremely rare surname. The cognomen Guajardo Fonseca is habitual in Latin America and the Caribbean, particularly Ecuador, where it is a very rare surname, Chile, where it is an extremely rare surname, and Mexico.
| VARIANT | COUNTRY |
|---|---|
| Guajardo Fonseca | Mexico, Chile, Ecuador |