There are 34 mathematicians whose last name begin with CY.

Cybenko, George Princeton University 1978
Cybis, Gabriela University of California, Los Angeles 2014
Cybo-Ottone, Alberto New York University 1993
Cycon, Hans Technische Universität Berlin 1979
Cyert, Richard Columbia University 1952
Cygan, Ewa Uniwersytet Jagielloński 1997
Cymbalyuk, Gennady Russian Academy of Sciences 1996
Cymberknop, Leandro Universidad Tecnológica Nacional 2013
Cynk, Sławomir Uniwersytet Jagielloński 1992
Cynn, Myong University of Illinois at Urbana-Champaign 1994
Cypher, Robert University of Washington 1989
Cyphert, Daniel Vanderbilt University 1982
Cyphert, John University of Wisconsin-Madison 2023
Cyr, Bryce McGill University 2022
Cyr, Christopher University of Florida 2017
Cyr, Derek State University of New York at Albany 2010
Cyr, Eric University of Illinois at Urbana-Champaign 2008
Cyr, Joseph State University of New York at Binghamton 2019
Cyr, Justin Russell Indiana University 2018
Cyr, Van The Pennsylvania State University 2010
Cyranek, René Ludwig-Maximilians-Universität München 2013
Cyranka, Jacek Uniwersytet Jagielloński 2013
Cyranski, John University of Wisconsin-Milwaukee 1974
Cyrier, Michelle Harvard University 2006
Cyrus, Saman University of Wisconsin-Madison 2021
Cyrus, Teresa University of California, Berkeley 1997
Cyrus, Vivian University of Kentucky 1994
Cysat, Johann Baptist Universität Ingolstadt 1619
Cysat, Johann Baptist Universität Ingolstadt
Cysneiros, Audrey Helen Universidade de São Paulo 2004
Cysneiros, Francisco Universidade de São Paulo 2004
Cysouw, Hendrik Universiteit Leiden 1934
Cytron, Ronald University of Illinois at Urbana-Champaign 1984
Cytrynbaum, Eric University of Utah 2001