Cognomen Santos Casimiro (Santos Casimiro 
) , in the world, is an extremely rare last name. The cognomen Santos Casimiro is habitual in Spain, where it is a very rare surname, Chile, where it is an extremely rare surname, and Brazil. More frequently, Santos Casimiro is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Santos Casimiro | Spain, Peru, Chile, Ecuador, Brazil |