Cognomen Caseiro (Caseiro 
) , in all the world, is quite a rare family name. The family name Caseiro is characteristic of Portugal, where it is quite a common surname, Angola, where it is quite a rare surname, and France, where it is a rare surname. Not in comparison with a country's population, it is commonest in Portugal, Brazil, and Angola. Very seldom, Caseiro is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Caseiro | Portugal, France, Argentina, Brazil, Angola |
|
joaquim caseiro PT (b. 1882) |
|
|
mara caseiro BR (b. 1964) |
|
| ana rita caseiro researcher |
|
|
| diamantino antónio caseiro Ph.D. Instituto Superior Técnico 2003 |
|
|
| armando caseiro researcher |
|
|
| alexandre caseiro researcher |
|
|
| raquel susana giraldes caseiro Ph.D. Universidade de Coimbra 2003 |
|
|
| rafael caseiro Angolan politician |
|
|
| edgar caseiro Portuguese footballer, PT (b. 1980) |
|
|
| nuno josé mendes fernandes caseiro (b. 1974) |
|