| Hugh Calkins (Baltimore, US) | P503 |
| Angelika Carl (Oldenburg) | B57, P317 |
| Jörg Carlsson (Kalmar, SE) | P511, Z66 |
| Sven Cassens (Karlsruhe) | P137 |
| William Catterall (Seattle, US) | P373, Z70 |
| Corinna Ceconi (Hildesheim) | P502 |
| Illya Chaikovsky (Essen) | P100 |
| Tushar Chatterjee (Rostock) | H31 |
| Ajay Chavan (Hannover) | P339 |
| Michael Christ (Marburg) | H532, P143 |
| Teng-Chao Chu (New York, US) | P121 |
| Matthias Claus (Berlin) | P369 |
| Marcel Claus (Oldenburg) | B63, P315 |
| Manfred Clemens (Osnabrück) | P311 |
| Günther Clermont (Traunstein) | B56, P108 |
| Antonio Colombo (Milano, IT) | P299 |
| Charles Cox (College Station, US) | P78 |
| Corinna Cozub-Poetica (Krefeld) | P463, P464 |
| Marlies Crombach (Marburg) | P83 |