Cognomen Castillo Dias (Castillo Dias 
) , all around the world, is a very rare last name. The surname Castillo Dias is characteristic of Latin America and the Caribbean, particularly Ecuador, where it is a rare surname, Colombia, where it is a very rare surname, and Peru, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Castillo Dias | Ecuador, Peru, Colombia, Venezuela |