Cognomen Riaaz (Riaaz 
) , in the entire world, is a rare surname. The surname Riaaz is characteristic of Southern Asia, particularly Bangladesh, where it is a very rare surname, Pakistan, and India, where it is an extremely rare surname. Also, Riaaz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Riaaz | Pakistan, Trinidad and Tobago, South Africa, India, Bangladesh |