Family name Regiina (Regiina 
) , across the world, is a very rare cognomen. The last name Regiina is characteristic of Spain, where it is an extremely rare surname, Nigeria, and Brazil. More frequently, Regiina is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Regiina | Estonia, Mexico, Nigeria, United States, Brazil |