Cognomen Rioma (Rioma 
) , all around the world, is an extremely rare last name. The family name Rioma is characteristic of Georgia, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and the United States. Predominantly, Rioma is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rioma | South Africa, Spain, United States, India, Venezuela |