There are 4 mathematicians whose last name begin with KOSY.
| Kosyak, Alexander | Taras Shevchenko National University of Kyiv | 1985 |
| Kosygin, Denis | Princeton University | 1997 |
| Kosygina, Elena | New York University | 1999 |
| Kosytsina, Nadiya | Universität Greifswald | 2012 |