Cognomen Riox (Riox 
) , around the globe, is a very rare family name. The last name Riox is habitual in Colombia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Riox is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Riox | United States, Philippines, Colombia |