| C’den | C-Jay | Ça?atay |
| Ça?da? | Ça?lar | Ça?lar |
| Ça?r? | Cabdifataax | Cabdulgadir |
| Caden | Caelan | Caelen |
| Caelius | Caesar | Caetano |
| Caewen | Cagri | Cahit |
| Cai | Caiden | Cailan |
| Cailen | Caimen | Caimin |
| Cain | Caine | Caj |
| Calay | Caleb | Calixte |
| Callergio | Callisto | Callum |
| Calum | Calvin | Cameron |
| Camiel | Camille | Camillo |
| Camilo | Camron | Camyl |
| Can | Çan | Cander |
| Caner | Canpolat | Cardin |
| Carel | Carl | Carlito |
| Carlo | Carlos | Carlson |
| Carmano | Carmelio | Carolus |
| Carst | Carsten | Carter |
| Carwyn | Cas | Casey |
| Casijn | Casimir | Casjen |
| Caspar | Casper | Caspian |
| Cass | Cassedy | Cassel |
| Cassidey | Cassidy | Cassius |
| Castiël | Cástor | Castor |
| Cathal | Cato | Catrinus |
| Cauã | Cauan | Cavan |
| Caya | Caydee | Cayden |
| Cayetano | Caylan | Caynne |
| Caz | Cealden | Cebrail |
| Cecco | Cederinhyo | Cèdric |
| Cédric | Cedric | Cedrik |
| Cèdrique | Cee | Cee-Jay |
| Ceejay | Ceel | Cees |
| Céjay | Celal | Celalettin |
| Celestino | Celil | Celino |
| Celvin | Celyn | Cem |
| Cem?ah | Cemal | Cemali |
| Cemil | Cemmy | Cengiz |
| Cengizhan | Cenn | Ceraldo |
| Ceres | Cerezo | Cerfas |
| Cernoux | Cesar | César |
| Cesare | Cessius | Cesur |
| Çetin | Ceyan | Ceyden |
| Ceyhun | Ceylan | Ceylon |
| Cézanne | Cézare | Cezary |
| Chaceli | Chad | Chadi |
| Chady | Chaedan | Chaëll |
| Chaevynn | Chafik | Chafiq |
| Chahid | Chahin | Chahine |
| Chai | Chaim | Chairo |
| Chaïro | Chakir | Chams |
| Chamsedine | Chance | Chanceley |
| Chanda | Chandandeep | Chander |
| Chandley | Chandly | Chandradhar |
| Chaneau | Change | Chanindu |
| Channing | Chano | Chanoey |
| Chanselle | Chantino | Chantuo |
| Chaquille | Chaquino | Charafdine |
| Charafeddine | Charalambos | Charel |
| Charezo | Charger | Chargiño |
| Charif | Charino | Charisano |
| Charith | Charles | Charleson |
| Charley | Charlie | Charlton |
| Charly | Charmene | Charnel |
| Charon | Charrinjo | Charrison |
| Charun | Chase | Chasin |
| Chatura | Chavaino | Chavairo |
| Chavanel | Chavesz | Chavez |
| Chavill | Chay | Chayim |
| Chayne | Chayo | Chayron |
| Chayton | Chayzen | Chaz |
| Che | Ché | Ched |
| Cheich | Cheick | Cheikhbaye |
| Chekib | Cheleng | Cheman |
| Chen | Chenaïro | Chendo |
| Cheng | Cherano | Cherif |
| Cherninyo | Cherno | Chernor |
| Cherson | Ches | Chesaro |
| Chesley | Chesney | Chesron |
| Chess | Chessie | Chester |
| Chévandro | Chevanny | Chevano |
| Chevaro | Chevaun | Chevenno |
| Cheveyo | Chévez | Chevon |
| Chevy | Chi | Chi-hang |
| Chiayro | Chico | Chidalu |
| Chidindu | Chidubem | Chiedozie |
| Chief | Chiel | Chiem |
| Chigozie | Chihab | Chiheb |
| Chikezie | Chileon | Chiljon |
| Chill | Chimaero | Chimuanya |
| Chino | Chinomnso | Chiron |
| Chivago | Chivairo | Chivano |
| Chivayro | Choba | Choukri |
| Chrétien | Chris | Chris-Thomas |
| Chrisayro | Chriss | Chrissie |
| Christ | Christan | Christean |
| Christen | Christiaan | Christiaano |
| Christian | Christián | Christiann |
| Christiano | Christianus | Christijn |
| Christivie | Christo | Christof |
| Christoff | Christoffel | Christoffer |
| Christon | Christoph | Christophe |
| Christopher | Chuck | Chuiliëndrik |
| Chuk | Chukwuma | Chukwuzendu |
| Chulyano | Chun | Churdensley |
| Chyano | Chyro | Chyvaino |
| Cian | Ciano | Ciaran |
| Cicero | Ciërro | Cies |
| Cihan | Cilencio | Cillian |
| Cinar | Çinar | Cinto |
| Cirano | Ciro | Cis |
| Cisco | Ciske | Ciske-Sil |
| Civan | Ciwan | Ciz |
| Claas | Clamairo | Clarence |
| Clasina | Clasinus | Claudio |
| Clayendro | Clayshelo | Clayti-Jaymiëll |
| Clayton | Clayvansly | Cleijs |
| Clemens | Clement | Cliff |
| Clifford | Clim | Clint |
| Cloud | Clovis | Co |
| Co?kun | Codey | Codi |
| Cody | Coen | Coenraad |
| Coensen | Coert | Colin |
| Collin | Collyn | Colm |
| Conall | Cong | Công |
| Conleigh-Sean | Conner | Connor |
| Conor | Conrad | Constant |
| Constantijn | Constantin | Constantine |
| Contiego | Cooper | Coos |
| Cor | Cor-Jan | Cordell |
| Cordian | Corne | Corné |
| Corneille | Cornel | Cornelis |
| Cornelius | Corstiaan | Corwin |
| Cosmas | Cosmeno | Cosmo |
| Craig | Créjean | Crijn |
| Cris | Cristiaan | Cristian |
| Cristiano | Crit | Cros |
| Crow | Cruz | Csongor |
| Cullan | Cumar | Curdley |
| Curtis | Cyan | Cyann |
| Cyano | Cydney | Cüneyit |
| Cüneyt | Cyprian | Cyril |
| Cyrile | Cyrill | Cyrus |