There are 44 mathematicians whose last name begin with DIR.
| Dirac, Gabriel | University of London | 1952 |
| Dirac, Paul | University of Cambridge | 1926 |
| Diracca, Luca | Università degli Studi di Padova | 2006 |
| Dirand, J. M. | Université Henri Poincaré Nancy 1 | 1969 |
| Dirbák, Matúš | Matej Bel University, Banska Bystrica | 2013 |
| Dirckx, Simon | Katholieke Universiteit Leuven | 2024 |
| Dirdak, Abigayle | University of Arizona | 2024 |
| Director, Hannah | University of Washington | 2020 |
| Director, Stephen | University of California, Berkeley | 1968 |
| Direev, Yury | Moscow Institute of Electronics and Mathematics | 1975 |
| Direk, Zilal | Istanbul University | 2016 |
| Dirgahayu, Teduh | Universiteit Twente | 2010 |
| Dirican, Esma | Hacettepe Üniversitesi | 2018 |
| Dirichlet, Gustav | Rheinische Friedrich-Wilhelms-Universität Bonn | 1827 |
| Dirick, Lore | Katholieke Universiteit Leuven | 2015 |
| Dirickx, Yvo | Yale University | 1971 |
| Dirik, Fadime | Ondokuzmayis University | 2010 |
| Dirken, Mark | Universiteit Leiden | 1991 |
| Dirkes, Alain | Johann Wolfgang Goethe-Universität Frankfurt am Main | 2018 |
| Dirkmaat, Auke | Universiteit Leiden | 1989 |
| Dirks, Albertus | Technische Universiteit Delft | 1973 |
| Dirks, Bradley | University of Michigan | 2023 |
| Dirks, Carolin | Westfälische Wilhelms-Universität Münster | |
| Dirks, Carsten Gerd | Philipps-Universität Marburg | 2001 |
| Dirkse, Steven | University of Wisconsin-Madison | 1994 |
| Dirksen, Arthur | Universiteit Utrecht | 1990 |
| Dirksen, Enno | Georg-August-Universität Göttingen | 1820 |
| Dirksen, Hauke | Christian-Albrechts-Universität zu Kiel | 2016 |
| Dirksen, Huibert | Technische Universiteit Delft | 1958 |
| Dirksen, Sjoerd | Technische Universiteit Delft | 2011 |
| Dirksz, Daniel | Rijksuniversiteit Groningen | 2011 |
| Dirkzwager, Maarten | Technische Universiteit Delft | 1996 |
| Dirmeier, Alexander | Technische Universität Berlin | 2013 |
| Dirmeier, Simon | ETH Zürich | 2020 |
| Dirmeyer, Jennifer | George Mason University | 2009 |
| Dirnberger, Michael | Universität des Saarlandes | 2017 |
| Dirnböck, Hans | Alpen-Adria-Universität Klagenfurt | 1985 |
| Dirne, Corné | Technische Universiteit Eindhoven | 1990 |
| Dirnfeld, Pinches | University of Utah | 2020 |
| Diroff, Daniel | University of Minnesota - Twin Cities | 2019 |
| Dirr, Gunther | Bayerische Julius-Maximilians-Universität Würzburg | 2001 |
| Dirr, Nicolas | Universität Leipzig | 2002 |
| Dirrenberger, Justin | École Nationale Supérieure des Mines de Paris | 2012 |
| Dirrler, Martin | Universität Mannheim | 2017 |