Last name Guayllasaca Loja (Guayllasaca Loja 
) , in the entire world, is an extremely rare family name. The surname Guayllasaca Loja is habitual in Ecuador, where it is a very rare surname, and Spain, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Guayllasaca Loja | Ecuador, Spain |