| Last Name | First Name Sort descending | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Willems | Jan C. | 1998 | Berlin | Control Theory & Optimization |
| Hogendijk | Jan P. | 1994 | Zurich | History of Mathematics |
| Solovej | Jan Philip | 2022 | Virtual | Mathematical Physics |
| Hesthaven | Jan S. | 2022 | Virtual | Numerical Analysis and Scientific Computing |
| Stromberg | Jan-Olov | 1998 | Berlin | Numerical Analysis & Scientific Computing |
| Zvonimir | Janko | 1970 | Nice | Algebra |
| Kollár | János | 1990 | Kyoto | Algebraic Geometry |
| Kollár | János | 2014 | Seoul | Plenary |
| Pach | János | 2014 | Seoul | Combinatorics |
| Pintz | János | 2014 | Seoul | Number Theory |
| Devisme | Jaques | 1936 | Oslo | Analysis |
| Nesetril | Jaroslav | 2010 | Hyderabad | Combinatorics |
| Wlodarczyk | Jaroslaw | 2006 | Madrid | Algebraic and Complex Geometry |
| Miller | Jason | 2018 | Rio de Janeiro | Probability and Statistics |
| Ghosh | Jayanta | 1998 | Berlin | Prob & Stats |
| Bellissard | Jean | 1994 | Zurich | Mathematical Physics |
| Bertoin | Jean | 2002 | Beijing | Prob & Stats |
| Boccardi | Jean | 1900 | Paris | Mechanics |
| Boccardi | Jean | 1920 | Strasbourg | Mechanics, Physical Mathematics, Astronomy |
| Bourgain | Jean | 1983 | Warszawa | Real & Func. Analy. |
| Bourgain | Jean | 1986 | Berkeley | Real and Functional Analysis |
| Bourgain | Jean | 1994 | Zurich | Plenary/Prize winner |
| Chazy | Jean | 1924 | Toronto | Mechanics, Physics, Astronomy, Geophysics |
| Giraud | Jean | 1970 | Nice | Algebra |
| Lannes | Jean | 1994 | Zurich | Topology |