Starting with letter C
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 981 | Ciro | Spanish | Throne; sun. | M | |
| 982 | Cis | Biblical | Hard, difficult, straw, for age. | M | |
| 983 | Cis | English | Diminutive of Christie: Diminutives of any masculine or feminine name begining with Christ-, for example Christahel, Christian, or Christopher. | M | |
| 984 | Cisco | Spanish | Frenchman. | M | |
| 985 | Cisleu | Biblical | Rashness, confidence. | M | |
| 986 | Ciss | English | Diminutive of Christie: Diminutives of any masculine or feminine name begining with Christ-, for example Christahel, Christian, or Christopher. | M | |
| 987 | Cissie | English | Diminutive of Christie: Diminutives of any masculine or feminine name begining with Christ-, for example Christahel, Christian, or Christopher. | M | |
| 988 | Cissy | English | Diminutive of Christie: Diminutives of any masculine or feminine name begining with Christ-, for example Christahel, Christian, or Christopher. | M | |
| 989 | CIyde | Welsh | Loud voiced. | M | |
| 990 | CIywd | Welsh | Loud voiced. | M | |
| 991 | Claas | Greek | People's victory. | M | |
| 992 | Clach | Scottish | Stone. | M | |
| 993 | Cladian | Latin | Lame. | M | |
| 994 | Claec | English | Dark. | M | |
| 995 | Claeg | English | Mortal. | M | |
| 996 | Claegborne | English | From the clay brook. | M | |
| 997 | Claegtun | English | Mortal. | M | |
| 998 | Claiborn | English | From the clay brook. | M | |
| 999 | Claiborne | English | Variant of Clayborne: Stream by a clay bed. | M | |
| 1000 | Clair | English | Diminutive of Clarence: Clear. | M | |