Cognomen Riyena (Riyena 
) , in all the world, is an extremely rare last name. The last name Riyena is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. More frequently, Riyena is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Riyena | Philippines, United States, South Africa, India |