There are 13 mathematicians whose last name begin with SIO.
| Sioen, Mark | Universiteit Antwerpen | 1997 |
| Siokos, Stavros | University of Massachusetts Amherst | 1998 |
| Sion, Maurice | University of California, Berkeley | 1951 |
| Sion, Radu | Purdue University | 2004 |
| Sionoid, Peadar | University of Cambridge | 1994 |
| Siopacha, Maria | Technische Universität Wien | 2007 |
| Siopsis, Maria | University of Tennessee - Knoxville | 2002 |
| Siorpaes, Pietro | Carnegie Mellon University | 2011 |
| Sioshansi, Ramteen | University of California, Berkeley | 2007 |
| Sioson, Federico | University of California, Berkeley | 1960 |
| Sioutas, Savvas | Technische Universiteit Eindhoven | 2020 |
| Sioutas, Spyros | University of Patras | 2002 |
| Siow, Aloysius | The University of Chicago | 1981 |