Cognomen Coillo (Coillo 
) , all around the world, is a rare surname. The surname Coillo is characteristic of Latin America and the Caribbean, particularly Bolivia, where it is a rare surname, Peru, and Chile, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Latin America and the Caribbean, particularly Peru, Bolivia, and Brazil. Very seldom, Coillo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Coillo | Bolivia, Brazil, Peru, Spain, Chile |