Cognomen Arroyo Castillo (Arroyo Castillo 
) , around the globe, is a rare family name. The cognomen Arroyo Castillo is habitual in Ecuador, where it is quite a rare surname, Chile, where it is a rare surname, and Spain, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Arroyo Castillo | Chile, Mexico, Ecuador, Colombia, Spain |