Surname Kayero (Kayero 
, Cahier 
) , in the world, is quite a rare family name. The family name Kayero is habitual in France, where it is a rare surname, Ethiopia, and Sweden. Much less frequently, Kayero is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kayero | Ethiopia, Nigeria, India |
| Cahier | United States, Sweden, France |