Surname Rehi (Rija 
, Riga 
, Rehi 
) , around the world, is a common last name. The surname Rehi is characteristic of Greece, where it is quite a common surname, Cyprus, and Equatorial Guinea, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Greece, Madagascar, and Indonesia. Also, Rehi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rija | Italy, India, Madagascar, Indonesia, Democratic Republic of the Congo |
| Riga | Italy, India, Greece, Indonesia, Democratic Republic of the Congo |
| Rehi | Malaysia, India, Indonesia, United States, Algeria |