Cognomen Regiana (Regiana 
) , in the world, is a rare surname. The cognomen Regiana is habitual in Indonesia, where it is a rare surname, Nigeria, where it is an extremely rare surname, and Argentina. In absolute terms, it is commonest in Indonesia, Nigeria, and Brazil. More frequently, Regiana is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Regiana | Philippines, Brazil, United States, Indonesia, Nigeria |