Surname Riyaas (Riyaas 
) , globally, is a very rare cognomen. The cognomen Riyaas is habitual in Southern Asia, particularly India, where it is an extremely rare surname. More frequently, Riyaas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Riyaas | Malaysia, India, South Africa, Saudi Arabia |