Last name Riahna (Riahna 
) , around the world, is a very rare family name. The family name Riahna is characteristic of South-eastern Asia, particularly Indonesia, where it is a very rare surname. Also, Riahna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Riahna | Indonesia, Australia, United States, India, Brazil |