| Name | Group | Language of Origin | Languages of Use | Meaning/Translation or Related Words | US 2021 |
|---|
| Cristoforo | Christoph | Old Greek | Italian | carrying Christ | |
| Cristopher | Christoph | Old Greek | English | carrying Christ | |
| Cristovão | Christoph | Old Greek | Portuguese | carrying Christ | |
| Crosby | Crosby | Old Norse | English | settlement by the cross | #930 |
| Crue | Carew | Welsh | English | Words: castle, fortress | |
| Cruz | Cruz | Spanish | Spanish, English | cross | #297 |
| Csaba | Csaba | Unknown | Hungarian | | |
| Csanád | Csanád | Unknown | Hungarian | | |
| Csongor | Csongor | Unknown | Hungarian | | |
| Cuinn | Cuinn | Old Irish | Irish | | |
| Cullen | Cullen | Unknown | English | | #742 |
| Curd | Curt | Old High German | German | Words: bold / counsel, advice, advisor | |
| Curdin | Curdin | Rhaeto-Romanic | Rhaeto-Romanic | | |
| Curt | Curtis | Old French | English | courtly, courteous | |
| Curt | Curt | Old High German | German, English | Words: bold / counsel, advice, advisor | |
| Curtis | Curtis | Old French | German, English | courtly, courteous | #778 |
| Curtiz | Curtis | Old French | English | courtly, courteous | |
| Curzio | Curtis | Old French | Italian | courtly, courteous | |
| Cyprian | Cyprian/Cipriana | Latin | German, English | from Cypres | |
| Cyprianus | Cyprian/Cipriana | Latin | German | from Cypres | |
| Cyprien | Cyprian/Cipriana | Latin | French | from Cypres | |
| Cyriac | Cyriacus | Old Greek | German | Words: lord | |
| Cyriacus | Cyriacus | Old Greek | German | Words: lord | |
| Cyriel | Cyrill/Cyrielle | Old Greek | Dutch | Words: lord | |
| Cyril | Cyrill/Cyrielle | Old Greek | German, English | Words: lord | |
| Cyrill | Cyrill/Cyrielle | Old Greek | German | Words: lord | |
| Cyrille | Cyrill/Cyrielle | Old Greek | French | Words: lord | |
| Cyrillus | Cyrill/Cyrielle | Old Greek | German | Words: lord | |
| Cyrus | Cyrus/Kyra | Old Persian | English | Words: lord | #350 |
