There are 13 mathematicians whose last name begin with KLEN.
| Klén, Riku | Turun yliopisto | 2009 |
| Klencki, Jakub | Radboud Universiteit Nijmegen | 2021 |
| Klenk, Jürgen | Eberhard-Karls-Universität Tübingen | 1997 |
| Klenk, Simone | Universität Ulm | 2006 |
| Klenke, Achim | Friedrich-Alexander-Universität Erlangen-Nürnberg | 1996 |
| Klenke, Reinhard | Technische Universität Carolo-Wilhelmina zu Braunschweig | 1977 |
| Klenke, Tomas | Harvard University | 2001 |
| Klenovčan, Pavel | Comenius University | 1987 |
| Klenow, Peter | Stanford University | 1991 |
| Klensin, John | Massachusetts Institute of Technology | 1979 |
| Klenske, Edgar | ETH Zürich | 2017 |
| Klentzman, Jill | Southern Methodist University | 2009 |
| Klenzan, Jennifer | Universität zu Köln | 2014 |