| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Hazlett | O. C. | 1928 | Bologna | Analysis |
| Hazlett | O.C. | 1924 | Toronto | Algebra, Theory of Numbers, Analysis |
| Hayman | W. K. | 1954 | Amsterdam | Analysis |
| Hayman | W. K. | 1970 | Nice | Analysis |
| Haydon | Richard | 2018 | Rio de Janeiro | Analysis and Operator Algebras |
| Hayashi | Shuhei | 1998 | Berlin | Ordinary Differential Equations & Dynamical Systems |
| Hawkins | T. | 1986 | Berkeley | History of Mathematics |
| Hawkins | Thomas | 1974 | Vancouver | History and Education |
| Hausel | Tamas | 2022 | Virtual | Algebraic and Complex Geometry |
| Hatzidakis | N. | 1912 | Cambridge | Didactics |
| Hatzidakis | N. | 1912 | Cambridge | Geometry |
| Hatzidakis | N. | 1920 | Strasbourg | Geometry |
| Hatzidakis | N. | 1928 | Bologna | Elementary Mathematics, Didactical Questions, Mathematical Logic |
| Hatzidakis | N. | 1928 | Bologna | Geometry |
| Hatzidakis | N. | 1932 | Zurich | Geometry |
| Hatcher | A. E. | 1978 | Helsinki | Topology |
| Hastings | Matthew | 2022 | Virtual | Mathematical Physics |
| Hastad | Johan | 1998 | Berlin | Mathematical Aspects of Computer Science |
| Hasse | H. | 1932 | Zurich | Algebra and Number Theory |
| Hasse | H. | 1936 | Oslo | Plenary |
| Haskell | M. W. | 1928 | Bologna | Geometry |
| Haskell | M.W. | 1924 | Toronto | Geometry |
| Harvey | R. | 1983 | Warszawa | Complex Analysis |
| Hartree | D. R. | 1936 | Oslo | Mathematical Physics, Astronomy and Geophysics |
| Harten | Ami | 1990 | Kyoto | Computational Methods |