| Clanbase | ClanBase |
| Clara | Clara |
| Clara af Assisi | Klara von Assisi |
| Clara Bow | Clara Bow |
| Clara Schumann | Clara Schumann |
| Clara Zetkin | Clara Zetkin |
| Clarence Melvin Zener | Clarence Melvin Zener |
| Clarence Seedorf | Clarence Seedorf |
| Clarion | Clarion |
| Clarion programmering | Clarion |
| Clark Gable | Clark Gable |
| Claude Adrien Helvétius | Claude Adrien Helvétius |
| Claude Chabrol | Claude Chabrol |
| Claude Criquielion | Claude Criquielion |
| Claude Debussy | Claude Debussy |
| Claude Jade | Claude Jade |
| Claude Monet | Claude Monet |
| Claudia Cardinale | Claudia Cardinale |
| Claudio Monteverdi | Claudio Monteverdi |
| Claudius | Claudius |
| Claudius II | Claudius Gothicus |
| Claus von Stauffenberg | Claus Schenk Graf von Stauffenberg |
| Claustrum | Claustrum |
| Claves | Claves |
| Clavicula | Schlüsselbein |
| Claviorganum | Claviorganum |
| Clay County | Clay County |
| Clayton Conrad Anderson | Clayton Conrad Anderson |
| Clemens af Alexandria | Clemens von Alexandria |
| Clemens Brentano | Clemens Brentano |
| Clement Attlee | Clement Attlee |
| Clementine-missionen | Clementine |
| Cleopatra Selene | Kleopatra Selene |
| Clermont-Ferrand | Clermont-Ferrand |
| Cleveland | Cleveland |
| Cleveland Abbe | Cleveland Abbe |
| Cleveland Browns | Cleveland Browns |
| Cleveland Indians | Cleveland Indians |
| Cliff Burton | Clifford Lee Burton |
| Cliff Richard | Cliff Richard |
| Clifton | Clifton |
| Clint Eastwood | Clint Eastwood |
| Clinton | Clinton |
| Clipper | Cutty Sark |
| Clips | Büroklammer |
| Clive Owen | Clive Owen |
| Clive Sinclair | Clive Sinclair |
| Clivia | Klivien |
| Clodomer | Chlodomer |
| Clone Wars | Clone Wars |
| Clonmel | Clonmel |
| cloudcomputing | Cloud-Computing |
| Cloudsat | CloudSat |
| Club Brügge | FC Brügge |
| Clube de Regatas do Flamengo | Flamengo Rio de Janeiro |
| Cluedo | Cluedo |
| Cluj | Bezirk Cluj |
| Cluj-Napoca | Cluj-Napoca |
| Cluny | Cluny |
| Clyde Tombaugh | Clyde Tombaugh |
| Clymenedelfin | Clymene-Delfin |
| Clásica de San Sebastián | Clásica San Sebastián |
| Clément Janequin | Clément Janequin |
| CMAS | Confédération Mondiale des Activités Subaquatiques |
| CMRR | Gleichtaktunterdrückung |
| CMYK | CMYK-Farbmodell |
| CN Tower | CN Tower |
| CNC-maskine | Computerized Numerical Control |
| CNN | Cable News Network |
| CNT | Confederación Nacional del Trabajo |
| Coahuila | Coahuila |
| coating | Beschichtung |
| COBOL | COBOL |
| COBRA | CoBrA |
| Coca | Cocastrauch |
| Coca-Cola | Coca-Cola |
| Coca-familien | Rotholzgewächse |
| Coca-slægten | Cocastrauch |
| Cochenillelus | Koschenille |
| Cochise County | Cochise County |
| Cochlear Implant | Cochleaimplantat |
| Cockerspaniel | English Cocker Spaniel |
| Cockpit | Pilotenkanzel |
| Cocktail | Cocktail |
| Coco Chanel | Coco Chanel |
| Coconino County | Coconino County |
| Cocosøerne | Kokosinseln |
| Code talker | Navajo-Code |
| Codec | Codec |
| Codex Alexandrinus | Codex Alexandrinus |
| Codex Argenteus | Codex Argenteus |
| Codex Gigas | Codex Gigas |
| Codex Leningradensis | Codex Leningradensis |
| Codex Sinaiticus | Codex Sinaiticus |
| Codon | Genetischer Code |
| Coelacanth | Quastenflosser |
| Coenraad Jacob Temminck | Coenraad Jacob Temminck |
| Coenzym | Koenzym |
| Cofidis | Équipe Cofidis |
| Cogito ergo sum | Cogito ergo sum |
| Cognac | Cognac |
| Coimbra | Coimbra |
| Coitus reservatus | Karezza |
| Cojedes | Cojedes |
| Col du Tourmalet | Col du Tourmalet |
| Cola | Cola |
| Cold open | Teaser |
| Coldplay | Coldplay |
| Coleman Hawkins | Coleman Hawkins |
| Coleslaw | Krautsalat |
| colibakterier | Kolibakterien |
| Colima | Colima |
| Colin Farrell | Colin Farrell |
| Colin Firth | Colin Firth |
| Colin Greenwood | Colin Greenwood |
| Colin Maclaurin | Colin Maclaurin |
| Colin McRae | Colin McRae |
