There are 13 mathematicians whose last name begin with LESSI.
| Lesiak, Jan | Uniwersytet Łódzki | 1975 |
| Lesieur, Franck | Université d'Orléans | 2003 |
| Lesieur, Léonce | Université de Paris | 1945 |
| Lesieur, Marcel | Université de Nice-Sophia Antipolis | 1973 |
| Lesieutre, Bernard | ||
| Lesieutre, George | University of California, Los Angeles | 1989 |
| Lesieutre, John | Massachusetts Institute of Technology | 2014 |
| Lesigne, Emmanuel | Université de Rennes 1 | 1981 |
| Lesin, Alexander | California Institute of Technology | 1994 |
| Lesinigo, Matteo | École Polytechnique Fédérale de Lausanne (EPFL) | 2013 |
| Lesisz, Włodzimierz | Uniwersytet Warszawski | |
| Lessiad, Sid'Ahmed | Université Cadi Ayyad, Marrakech | 1997 |
| Lessin, Aaron | Air Force Institute of Technology | 2018 |