There are 13 mathematicians whose last name begin with ISSI.
| Isidori, Alberto | Università di Roma La Sapienza | 1969 |
| Isidoro, John | Boston University | 2004 |
| Isidro, José María | Universidade de Santiago de Compostela | 1970 |
| Isidro Gómez, María | Universidad de Salamanca | 1977 |
| Isienyi, Sunday | University of Nigeria | 2021 |
| Isife, Kenneth | University of Nigeria | 2019 |
| Isihara, Ariya | Vrije Universiteit Amsterdam | 2010 |
| Isik, Mehmet Umut | University of Pennsylvania | 2011 |
| Isik, Sinan | Boğaziçi University | 2011 |
| Işik, Erman | University College Dublin | 2023 |
| Işık, Leyla | Sabanci University | 2015 |
| Isik-Dikmelik, Aylin | The Johns Hopkins University | 2004 |
| Ising, Ernst | Universität Hamburg | 1924 |