There are 6 mathematicians whose last name begin with RIY.
| Riyadi, | Universitas Gadjah Mada | 2009 |
| Riyahi, Zahra | Shahid Beheshti University | 2014 |
| Riyamongkol, Panomkhawn | University of Miami | 2003 |
| Riyanti, Christina | Technische Universiteit Delft | 2005 |
| Riyapan, Pakwan | University of Leeds | 2013 |
| Riyu, Yu | State University of New York at Stony Brook | 2015 |