There are 14 mathematicians whose last name begin with ORTO.
| Ortolani, Stefano | Vrije Universiteit Amsterdam | 2013 |
| Ortoleva, Peter | Cornell University | 1971 |
| Ortoleva, Pietro | New York University | 2009 |
| Ortoleva, Sami | University of California, San Diego | 2023 |
| Ortolf, Christian | Albert-Ludwigs-Universität Freiburg im Breisgau | 2016 |
| Ortolf, Hans-Joachim | Rheinische Friedrich-Wilhelms-Universität Bonn | 1969 |
| Orton, Anthony | ||
| Orton, Louisa | University of Nottingham | 2003 |
| Orton, Marion | Indiana University | 1971 |
| Orton, Matthew | University of Cambridge | 2004 |
| Orton, Richard | University of Cambridge | 2019 |
| Orton, Sharyn | University of South Florida | 2000 |
| Orton, Thomas | University of Oxford | 2023 |
| Orton, Jr., William | University of Illinois at Urbana-Champaign | 1951 |