There are 39 mathematicians whose last name begin with ROI.
| Roi, Larry | Purdue University | 1975 |
| Roiban, Radu | State University of New York at Stony Brook | 2001 |
| Roichman, Yuval | Hebrew University of Jerusalem | 1994 |
| Roick, Tyler | McMaster University | 2021 |
| Roider, Andreas | Rheinische Friedrich-Wilhelms-Universität Bonn | 2003 |
| Roider, Bernhard | Universität Innsbruck | 1969 |
| Roidos, Nikolaos | Loughborough University | 2010 |
| Roidot, Kristelle | Université de Bourgogne | 2011 |
| Roig, Fernando | Universidade de São Paulo | 2001 |
| Roig Martí, Agustí | Universitat Politècnica de Catalunya | 1992 |
| Roig Sanchis, Anna | Sorbonne Université | 2024 |
| Roijers, Diederik | Universiteit van Amsterdam | 2016 |
| Roijers, Frank | Universiteit van Amsterdam | 2009 |
| Roiko, Bodo | Georg-August-Universität Göttingen | 1976 |
| Roinestad, Kristine | Virginia Polytechnic Institute and State University | 2010 |
| Rois, Rumana | Technische Universität Kaiserslautern | 2017 |
| Roisin, Paul | Université Catholique de Louvain | 2007 |
| Roisner, Mikhail | 2014 | |
| Roitberg, Alice | Università degli Studi di Milano-Bicocca | 2023 |
| Roitberg, Joseph | New York University | 1968 |
| Roitberg, Yael | City University of New York | 1969 |
| Roitberg, Yakov | Voronezh State University | 1963 |
| Roitch, Vladimir | Imperial College London | 2015 |
| Roitenberg, V. | Yaroslavl State University | 2001 |
| Roiter, Andrei | St. Petersburg State University | 1963 |
| Roitershtein, Alexander | Technion-Israel Institute of Technology | 2004 |
| Roitgartz, Alexander | Taras Shevchenko National University of Kyiv | 1989 |
| Roith, Tim | Friedrich-Alexander-Universität Erlangen-Nürnberg | 2024 |
| Roitman, A. | ||
| Roitman, Haggai | Technion-Israel Institute of Technology | 2009 |
| Roitman, Judith | University of California, Berkeley | 1974 |
| Roitman, Marcos | Universidade Federal do Rio de Janeiro | 1995 |
| Roitman, Michael | Yale University | 2000 |
| Roitman, Pedro | Université Paris Diderot - Paris 7 | 2001 |
| Roitner, Heinz | University of Arizona | 1991 |
| Roitner, Valerie | Technische Universität Wien | 2020 |
| Roitzheim, Constanze | Rheinische Friedrich-Wilhelms-Universität Bonn | 2007 |
| Roitzsch, Michael | Technische Universität Dresden | 2013 |
| Roiz, Evgenii | Saratov State University | 1974 |