Cognomen Castro Loyola (Castro Loyola 
) , in the world, is a very rare family name. The surname Castro Loyola is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname, and Peru, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Castro Loyola | Chile, Peru |
Karen, Dayanna, Sebatian Andres, Johnny Elmer, Johana Andrea, and Graciela Antonieta