Cognomen Riyabut (Riyabut 
) , all over the world, is a very rare surname. The cognomen Riyabut is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, Riyabut is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Riyabut | India, Thailand |