Cognomen Rioza (Rioza 
) , globally, is a rare last name. The surname Rioza is habitual in Romania, where it is a rare surname, Malaysia, where it is a very rare surname, and Philippines. In absolute terms, it is the most numerous in India, Romania, and Philippines. Likewise, Rioza is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rioza | Indonesia, Romania, Philippines, United States, India |