Last name Riyhan (Riyhan 
) , all over the world, is a very rare surname. The surname Riyhan is habitual in Saudi Arabia, where it is a rare surname, Indonesia, where it is a very rare surname, and Turkey, where it is an extremely rare surname. Likewise, Riyhan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Riyhan | Brazil, India, Indonesia, Saudi Arabia, Turkey |