Surname Castillo Siguencia (Castillo Siguencia 
) , all over the world, is a very rare last name. The family name Castillo Siguencia is habitual in Ecuador, where it is a rare surname, and Spain, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Castillo Siguencia | Spain, Ecuador |
Maria Ines, and Wilson Freddy