Surname קלרו (Calero 
, Klero 
, קלרו 
) , in all the world, is a common cognomen. The family name קלרו is characteristic of Latin America and the Caribbean, particularly Nicaragua, where it is a common surname, Costa Rica, where it is quite a common surname, and Peru (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in Nicaragua, Spain, and Peru. Very seldom, קלרו is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Calero | Nicaragua, Spain, Peru, Colombia, Costa Rica |
| Klero | India, France, Brazil |
| קלרו | Israel |
| Clairaut | France |