Surname Caslo (Caslo 
) , around the world, is a very rare cognomen. The surname Caslo is characteristic of Belgium, where it is a rare surname, Spain, where it is a very rare surname, and Malaysia. Very seldom, Caslo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Caslo | Belgium, South Africa, Spain, Malaysia, Mexico |
| nancy caslo Belgian politician, BE (b. 1968) |
|