Family name Galarraga Castilla (Galarraga Castilla 
) , in all the world, is an extremely rare cognomen. The family name Galarraga Castilla is characteristic of Latin America and the Caribbean, particularly Ecuador, where it is a very rare surname, and Chile, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Galarraga Castilla | Ecuador, Chile |