There are 28 mathematicians whose last name begin with HASSL.
| Haslach, Jr., Henry | University of Wisconsin-Madison | 1979 |
| Haslam, Harold | University of California, Irvine | 1969 |
| Haslam, Michael | University of Western Ontario | 2003 |
| Haslam-Jones, Ughtred | University of Oxford | 1928 |
| Hasle, Per | Aarhus University | 1989 |
| Haslegrave, John | University of Cambridge | 2011 |
| Haslehurst, Mitchell | University of Victoria | 2022 |
| Hasler, Arthur | ETH Zürich | 1962 |
| Hasler, David | ETH Zürich | 2002 |
| Hasler, David | École Polytechnique Fédérale de Lausanne (EPFL) | 2001 |
| Hasler, Hans-Georg | Christian-Albrechts-Universität zu Kiel | 1967 |
| Hasler, Jordan | University of Illinois at Urbana-Champaign | 2016 |
| Hasler, Mario | Gottfried Wilhelm Leibniz Universität Hannover | 2009 |
| Haslett, John | ||
| Haslett, Stephen | Victoria University of Wellington | 1986 |
| Haslhofer, Robert | ETH Zürich | 2012 |
| Haslinger, Friedrich | Universität Wien | 1974 |
| Haslinger, Gareth | University of Liverpool | 2001 |
| Haslinger, Jaroslav | ||
| Haslmayr, Adam | ||
| Hasslacher, Brosl | State University of New York at Stony Brook | 1972 |
| Hassler, Gabriel | University of California, Los Angeles | 2022 |
| Hassler, James | University of California, Berkeley | 1952 |
| Hassler, Jasper | The University of Chicago | 1915 |
| Hassler, John | Massachusetts Institute of Technology | 1994 |
| Hassler, Uwe | Freie Universität Berlin | 1993 |
| Hassler, Wolfgang | Universität Graz | 2001 |
| Hasslinger, Gerhard | Technische Universität Darmstadt | 1986 |