Family name Horna Castillo (Horna Castillo 
) , all over the world, is an extremely rare surname. The family name Horna Castillo is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare surname, Ecuador, and Peru, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Horna Castillo | Ecuador, Chile, Peru |