Surname Castrosin (Castrosin 
) , in all the world, is a rare last name. The cognomen Castrosin is characteristic of Argentina, where it is a rare surname, Belgium, where it is a very rare surname, and Spain. Also, Castrosin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Castrosin | Belgium, United States, Spain, Argentina |