| Last Name | First Name | Year | City | Section/Speaker Type Sort ascending |
|---|---|---|---|---|
| Cech | E. | 1928 | Bologna | Geometry |
| Cech | E. | 1932 | Zurich | Geometry |
| Charpentier | Marie | 1932 | Zurich | Geometry |
| Cheeger | Jeff | 1986 | Berkeley | Geometry |
| Cheng | Shiu-Yuen | 1983 | Warszawa | Geometry |
| Chuard | Jules | 1932 | Zurich | Geometry |
| Clapier | Dr. | 1920 | Strasbourg | Geometry |
| Coble | A.B. | 1924 | Toronto | Geometry |
| Cohn-Vossen | S. | 1928 | Bologna | Geometry |
| Colin De Verdière | Y. | 1986 | Berkeley | Geometry |
| Comessatti | A. | 1932 | Zurich | Geometry |
| Commessatti | A. | 1928 | Bologna | Geometry |
| Connelly | R. | 1978 | Helsinki | Geometry |
| Corlette | Kevin | 1994 | Zurich | Geometry |
| Costa | A.R. da | 1924 | Toronto | Geometry |
| Crelier | L. | 1928 | Bologna | Geometry |
| Cummings | L.D. | 1924 | Toronto | Geometry |
| Cummings | Louise | 1932 | Zurich | Geometry |
| De Franchis | M. | 1908 | Rome | Geometry |
| De Kerékjártó | B. | 1928 | Bologna | Geometry |
| De Rham | G. | 1932 | Zurich | Geometry |
| Deaux | R. | 1928 | Bologna | Geometry |
| Delaunay | B. | 1924 | Toronto | Geometry |
| Delaunay | B. N. | 1928 | Bologna | Geometry |
| Delaunay | N. | 1924 | Toronto | Geometry |