Cognomen ºa (ºa 
) , in the world, is a very rare surname. The cognomen ºa is characteristic of Portugal, where it is a rare surname, Spain, where it is a very rare surname, and Chile, where it is an extremely rare surname. Very seldom, ºa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ºa | Portugal, Spain, Brazil, Chile, Argentina |