There are 21 mathematicians whose last name begin with CAY.
| Çay, Hatice | Yildiz Technical University | 2024 |
| Cayan, Daniel | University of California, San Diego | 1990 |
| Caycedo, Juan Diego | University of Oxford | 2012 |
| Cayci, Semih | The Ohio State University | 2020 |
| Cayco, Maria | Carnegie Mellon University | 1985 |
| Cayé, Thomas | ETH Zürich | 2017 |
| Cayemitte, Fritz | Columbia University | 2000 |
| Cayetano, Messinger | University of Michigan | 2002 |
| Cayford, Afton | University of California, Los Angeles | 1961 |
| Cayirci, Erdal | Boğaziçi University | 2000 |
| Cayley, Arthur | University College Dublin | 1864/1865/1875 |
| Cayley, Arthur | University of Oxford | 1864/1865/1875 |
| Cayley, Arthur | Universiteit Leiden | 1864/1865/1875 |
| Cayon, Laura | Universidad de Cantabria | 1993 |
| Cayot, Robert-Olivier | Université de Nice-Sophia Antipolis | 2001 |
| Cayrol, Claudette | ||
| Cayrol, Michel | ||
| Cayrols, Sebastien | Sorbonne Université | 2019 |
| Cayton, Charity Sue-Adams | North Carolina State University | 2012 |
| Cayton, Lawrence | University of California, San Diego | 2009 |
| Caywood, Thomas | Harvard University | 1947 |