| Name | Group | Language of Origin | Languages of Use | Meaning/Translation or Related Words | US 2021 |
|---|
| Cesare | Cäsar/Cesira | Latin | Italian | Words: cut, excise | |
| Cesarina | Cäsar/Cesira | Latin | Italian | Words: cut, excise | |
| Cesarino | Cäsar/Cesira | Latin | Italian | Words: cut, excise | |
| Cesario | Cäsar/Cesira | Latin | Italian | Words: cut, excise | |
| Cesidio | Cesidio | Latin | Italian | maybe pale | |
| Cesira | Cäsar/Cesira | Latin | Italian | Words: cut, excise | |
| Chiara | Clare | Latin | Italian | clear, bright | |
| Cinzia | Cynthia | Old Greek | Italian | woman from the mountain Kynthos on Delos island | |
| Cipriana | Cyprian/Cipriana | Latin | Italian | from Cypres | |
| Cipriano | Cyprian/Cipriana | Latin | Spanish, Italian | from Cypres | |
| Ciriaco | Cyriacus | Old Greek | Spanish, Italian | Words: lord | |
| Cirillo | Cyrill/Cyrielle | Old Greek | Italian | Words: lord | |
| Ciro | Cyrus/Kyra | Old Persian | Italian | Words: lord | |
| Clara | Clare | Latin | German, Spanish, Portuguese, English, Italian | clear, bright | #102 |
| Claretta | Clare | Latin | Italian | clear, bright | |
| Clarissa | Clare | Latin | German, Italian, English | clear, bright | #946 |
| Claudia | Claudius/Claudia | Latin | German, Scandinavian, Spanish, Italian | the limping | |
| Claudio | Claudius/Claudia | Latin | Spanish, Italian | the limping | |
| Clelia | Clelia | Latin | German, Italian, English | | |
| Clemente | Clement/Clemence/Clementine | Latin | Portuguese, Spanish, Italian | the merciful, the gentle | |
| Cleofa | Cleopas/Cleopha | Old Greek | Italian | glory of the father | |
| Cleofe | Cleopas/Cleopha | Old Greek | Italian | glory of the father | |
| Cleto | Anacletus | Old Greek | Portuguese, Spanish, Italian | called on, invoked | |
| Clio | Clio | Old Greek | Italian | Words: glory | |
| Cloris | Chloris | Old Greek | Italian | Words: greenish-yellow | |
| Clotario | Lothar | Old High German | Portuguese, Spanish, Italian | Words: loud, famous / army, warrior | |
| Clotilde | Klothilde | Old High German | Italian | Words: loud, famous / fight | |
| Coletta | Nicholas/Nicole | Old Greek | Italian | victory of the people | |
| Colomba | Colombe | Latin | Italian | dove | |
| Colombano | Columbano | Latin | Italian | dove | |
| Colombina | Colombe | Latin | Italian | dove | |
| Concetta | Concetta | Latin | German, Italian | | |
| Concettina | Concetta | Latin | Italian | | |
| 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 | |
| Consalvo | Gonzalo | Old High German | Italian | Words: fight | |
| Consolata | Consolata | Italian | Italian | consolation | |
| Constanza | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Cornelia | Cornelius/Cornelia | Latin | German, Italian | Words: horn | |
| Cornelio | Cornelius/Cornelia | Latin | Spanish, Italian | Words: horn | |
| Corrado | Conrad/Konrada | Old High German | Italian | Words: bold / counsel, advice, advisor | |
| Cosetta | Cosette | Unknown | Italian | | |
| Cosima | Cosmo/Cosima | Old Greek | German, Italian | | |
| Cosimo | Cosmo/Cosima | Old Greek | Italian | | |
| Cosma | Cosmo/Cosima | Old Greek | German, Italian | | |
| Cosmo | Cosmo/Cosima | Old Greek | German, Italian, English | | |
| Costanta | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Costante | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Costantino | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Costanza | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Costanzo | Konstantin/Konstanze | Latin | Italian | the steadfast | |
| Crescenzia | Crescenzio/Crescentia | Latin | Italian | the growing | |
| Crescenzio | Crescenzio/Crescentia | Latin | Italian | the growing | |
| Crispina | Crispin/Crispina | Latin | Italian | curly haired | |
| Crispino | Crispin/Crispina | Latin | Italian | curly haired | |
| Cristiana | Christian/Christine | Latin | Italian | Christian, disciple of Christ | |
| Cristiano | Christian/Christine | Latin | Italian | Christian, disciple of Christ | |
| Cristina | Christian/Christine | Latin | Spanish, Italian | Christian, disciple of Christ | |
| Cristoforo | Christoph | Old Greek | Italian | carrying Christ | |
| Cunegonda | Kunigunde | Old High German | Italian | Words: tribe, clan / fight | |
| Curzio | Curtis | Old French | Italian | courtly, courteous | |
| Dacia | Dacio/Dacia | Latin | Portuguese, Italian | from Dacia | |
| Daciano | Dacio/Dacia | Latin | Portuguese, Spanish, Italian | from Dacia | |
| Dacio | Dacio/Dacia | Latin | Portuguese, Spanish, Italian | from Dacia | |
| Dagoberto | Dagobert | Old High German | Portuguese, Spanish, Italian | Words: bright | |
| Dalila | Delilah | Hebrew | Italian | maybe feeble | |
| Dalmazio | Dalmazio | Latin | Italian | from Dalmatia | |
| Damaso | Damasus | Old Greek | Italian | tamer | |
| Damiana | Damian/Damiana | Old Greek | Italian | Words: tame, subdue | |
| Damiano | Damian/Damiana | Old Greek | Italian | Words: tame, subdue | |
| Daniela | Daniel/Daniela | Hebrew | German, Portuguese, Italian, Romanian, Czech, Polish | God is my judge | #264 |
| Daniele | Daniel/Daniela | Hebrew | Italian | God is my judge | |
| Daniele | Daniel/Daniela | Hebrew | Italian | God is my judge | |
| Daniella | Daniel/Daniela | Hebrew | German, Italian | God is my judge | #430 |
| Danielo | Daniel/Daniela | Hebrew | Italian | God is my judge | |
| Danilo | Daniel/Daniela | Hebrew | Portuguese, Spanish, Italian, Slavic, Tagalog | God is my judge | |
| Danio | Dan | Hebrew | Italian | Words: judge | |
| Dante | Dante | Latin | German, Italian | Words: endure, withstand | #311 |
| Dario | Darius/Daria | Old Persian | Italian | possessor of the good | #682 |
| Dasio | Dasio | Unknown | Italian | | |
| Davide | David/Davida | Hebrew | Italian, French | beloved | |
| Davino | David/Davida | Hebrew | Italian | beloved | |
| Dazio | Dazio | Unknown | Italian | | |
| Debora | Deborah | Hebrew | German, Italian, French, English, Hebrew | bee | |
| Deborah | Deborah | Hebrew | German, Italian, French, English, Hebrew | bee | #908 |
| Deborina | Deborah | Hebrew | Italian | bee | |
| Decimo | Decimo | Latin | Italian | the tenth | |
| Decio | Decimo | Latin | Spanish, Italian | the tenth | |
| Degna | Degna | Latin | Italian | maybe worthy | |
| Delfina | Delphina | Latin | Spanish, Italian | Words: dolphin | |
| Delfio | Delfio | Old Greek | Italian | brother | |
| Delinda | Gundelinde | Old High German | Italian | Words: fight / lime, linden, lime-wood shield / gentle, friendly | |
| Delio | Delio/Delia | Old Greek | Spanish, Italian | | |
| Demetria | Dimitri/Demetria/Dimitra | Old Greek | Italian | dedicated to Demeter | |
| Demetrio | Dimitri/Demetria/Dimitra | Old Greek | Portuguese, Spanish, Italian | dedicated to Demeter | |
| Democrito | Democritus | Old Greek | Italian | judge of the people | |
| Deodata | Adeodato/Adeodata | Latin | Italian | given by God | |
| Deodato | Adeodato/Adeodata | Latin | Italian | given by God | |
| Desideria | Desiderio/Desiree | Latin | Italian | the longed-for, the wished-for | |
| Desiderio | Desiderio/Desiree | Latin | Spanish, Italian | the longed-for, the wished-for | |
