| Last Name | First Name Sort descending | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| LeVeque | Randall J. | 2006 | Madrid | Numerical Analysis and Scientific Computing |
| Bott | Raoul | 1958 | Edinburgh | Topology |
| Bott | Raoul | 1970 | Nice | Plenary |
| Perrin | Raoul | 1900 | Paris | Number Theory and Algebra |
| Robert | Raoul | 1994 | Zurich | Applications of Mathematics in the Sciences |
| Rouquier | Raphael | 2006 | Madrid | Algebra |
| Krikorian | Raphaël | 2018 | Rio de Janeiro | Dynamical Systems and Ordinary Differential Equations |
| Beuzart-Plessis | Raphaël | 2022 | Virtual | Number Theory, Lie Theory and Generalizations |
| Siddiqi | Raziuddin | 1936 | Oslo | Analysis |
| Burachik | Regina | 2022 | Virtual | Control Theory and Optimization |
| Siegmund-Schultze | Reinhard | 2014 | Seoul | History of Mathematics |
| Kiehl | Reinhardt | 1970 | Nice | Analysis |
| Thomas | Rekha | 2018 | Rio de Janeiro | Control Theory and Optimization |
| Abgrall | Rémi | 2014 | Seoul | Numerical Analysis and Scientific Computing |
| Durán | Ricardo | 2006 | Madrid | Numerical Analysis and Scientific Computing |
| Mane | Ricardo | 1983 | Warszawa | Ord. diff. equations & dynamical systems |
| Mane | Ricardo | 1994 | Zurich | Ord. Diff. Equations |
| Nochetto | Ricardo Horatio | 2010 | Hyderabad | Numerical Analysis and Scientific Computing |
| Brauer | Richard | 1970 | Nice | Algebra |
| Durrett | Richard | 1990 | Kyoto | Probability & Mathematical Statistics |
| Hamilton | Richard | 2006 | Madrid | Plenary |
| Pink | Richard | 2002 | Beijing | Algebraic & Complex Geometry |
| Rado | Richard | 1936 | Oslo | Algebra and Number Theory |
| Rado | Richard | 1974 | Vancouver | Discrete Mathematics & Theory of Computation |
| Schoen | Richard | 2010 | Hyderabad | Plenary |