| Name | Group | Language of Origin | Languages of Use | Meaning/Translation or Related Words | US 2021 |
|---|
| Clivia | Clivia | English | German | | |
| Clodagh | Clodagh | Old Irish | Irish | | |
| Cloe | Chloe | Old Greek | German, English | green shoot, young shoot | |
| Cloé | Chloe | Old Greek | French | green shoot, young shoot | |
| Cloris | Chloris | Old Greek | Italian | Words: greenish-yellow | |
| Clothilde | Klothilde | Old High German | French | Words: loud, famous / fight | |
| Clotilda | Klothilde | Old High German | English | Words: loud, famous / fight | |
| Clotilde | Klothilde | Old High German | Italian | Words: loud, famous / fight | |
| Clover | Clover | English | English | clover | #865 |
| Coelestina | Celestine/Cölestina | Latin | German | heavenly, of the sky | |
| Cölestine | Celestine/Cölestina | Latin | German | heavenly, of the sky | |
| Coletta | Nicholas/Nicole | Old Greek | Italian | victory of the people | |
| Colette | Nicholas/Nicole | Old Greek | French | victory of the people | #454 |
| Coline | Colleen | Old Irish | English | girl | |
| Colleen | Colleen | Old Irish | English | girl | |
| Collins | Colleen | Old Irish | English | girl | #325 |
| Colomba | Colombe | Latin | Italian | dove | |
| Colombe | Colombe | Latin | French | dove | |
| Colombina | Colombe | Latin | Italian | dove | |
| Colombine | Colombe | Latin | English, French | dove | |
| Concepción | Concepción | Spanish | Spanish | conception | |
| Concetta | Concetta | Latin | German, Italian | | |
| Concettina | Concetta | Latin | Italian | | |
| Concha | Concepción | Spanish | Spanish | conception | |
| Conchita | Concepción | Spanish | Spanish | conception | |
| Conni | Konstantin/Konstanze | Latin | German | the steadfast | |
| Conni | Cornelius/Cornelia | Latin | German | Words: horn | |
| Connie | Cornelius/Cornelia | Latin | German | Words: horn | |
| Connie | Konstantin/Konstanze | Latin | German, English | the steadfast | |
| Conny | Cornelius/Cornelia | Latin | German | Words: horn | |
| Conrada | Conrad/Konrada | Old High German | Spanish, Italian | Words: bold / counsel, advice, advisor | |
| Conradina | Conrad/Konrada | Old High German | Spanish, Italian | Words: bold / counsel, advice, advisor | |
| Consolata | Consolata | Italian | Italian | consolation | |
| Constança | Konstantin/Konstanze | Latin | Portuguese | the steadfast | |
| Constance | Konstantin/Konstanze | Latin | French, English | the steadfast | |
| Constanza | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Constanze | Konstantin/Konstanze | Latin | German | the steadfast | |
| Consuela | Consuelo | Spanish | German, English | consolation | |
| Consuelo | Consuelo | Spanish | Spanish | consolation | |
| Cora | Cora | German | German | | #87 |
| Cora | Cora | Old Greek | French, English | maiden, virgin | |
| Coraima | Coraima | Unknown | English | | |
| Coral | Coral | English | English | Words: coral | |
| Coralee | Coral | English | English | Words: coral | |
| Coralia | Coral | English | Spanish | Words: coral | |
| Corália | Coral | English | Portuguese | Words: coral | |
| Coralie | Coral | English | English, French | Words: coral | |
| Coraline | Coral | English | French, English | Words: coral | #720 |
| Cordelia | Cordula | Latin | German, English | | |
| Cordula | Cordula | Latin | German, English | | |
| Corentine | Corentin/Corentine | Celtic | German, French | Words: storm | |
| Corey | Corey/Corey | Latin | English | Words: raven / ravine | |
| Cori | Corey/Corey | Latin | English | Words: raven / ravine | |
| Corina | Corinna | Old Greek | German, French, English | maiden, virgin | |
| Corinna | Corinna | Old Greek | German, French, English | maiden, virgin | |
| Corinne | Corinna | Old Greek | French | maiden, virgin | |
| Corliss | Corliss | Old English | English | free from anxiety | |
| Cornela | Cornelius/Cornelia | Latin | English | Words: horn | |
| Cornelia | Cornelius/Cornelia | Latin | German, Italian | Words: horn | |
| Cornélie | Cornelius/Cornelia | Latin | French | Words: horn | |
| Cornell | Cornelius/Cornelia | Latin | German | Words: horn | |
| Corona | Corona | Latin | German | Words: crown, garland | |
| Corrina | Corinna | Old Greek | English | maiden, virgin | |
| Corrine | Corinna | Old Greek | English | maiden, virgin | |
| Cortney | Courtney/Courtney | Old French | English | Words: short / nose | |
| Cosetta | Cosette | Unknown | Italian | | |
| Cosette | Cosette | Unknown | French | | |
| Cosima | Cosmo/Cosima | Old Greek | German, Italian | | |
| Cosma | Cosmo/Cosima | Old Greek | German, Italian | | |
| Costanta | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Costanza | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Courtney | Courtney/Courtney | Old French | English | Words: short / nose | |
| Cozette | Cosette | Unknown | French | | |
| Crescentia | Crescenzio/Crescentia | Latin | German | the growing | |
| Crescenzia | Crescenzio/Crescentia | Latin | Italian | the growing | |
| Cressida | Cressida | Old High German | English | | |
| Crispina | Crispin/Crispina | Latin | Italian | curly haired | |
| Cristal | Crystal | English | English | crystal | |
| Cristiana | Christian/Christine | Latin | Italian | Christian, disciple of Christ | |
| Cristina | Christian/Christine | Latin | Spanish, Italian | Christian, disciple of Christ | |
| Croía | Croía | Irish | Irish | Words: heart | |
| Crysta | Christian/Christine | Latin | English | Christian, disciple of Christ | |
| Crystal | Crystal | English | English | crystal | #960 |
| Csenge | Csenge | Unknown | Hungarian | | |
| Csilla | Csilla | Hungarian | Hungarian | Words: star | |
| Cui | Cui | Mandarin | Kanji symbol, Mandarin | green, green jade | |
| Cunegonda | Kunigunde | Old High German | Italian | Words: tribe, clan / fight | |
| Cunégonde | Kunigunde | Old High German | French | Words: tribe, clan / fight | |
| Cunegund | Kunigunde | Old High German | English | Words: tribe, clan / fight | |
| Cunegunda | Kunigunde | Old High German | Spanish | Words: tribe, clan / fight | |
| Cunegundes | Kunigunde | Old High German | English | Words: tribe, clan / fight | |
| Cydney | Sidney/Sidney | Old French | English | | |
| Cylia | Cecil/Cecilia | Latin | French | Words: blind | |
| Cyneburga | Cyneburga | Old English | English | royal fortress | |
| Cynthia | Cynthia | Old Greek | German, English | woman from the mountain Kynthos on Delos island | #806 |
| Cyra | Cyrus/Kyra | Old Persian | English | Words: lord | |
| Cyrielle | Cyrill/Cyrielle | Old Greek | French | Words: lord | |
