| Cardenas | Dweller near the hawthorn bushes. |
| Carderon | A variant of the name Calderon. |
| Cardiff | Welsh name derived from 'Caer Dyfryn' meaning 'fortress of the Taff valley' or 'fortress of the Taff river'. |
| Cardwell | From the cold spring or stream. |
| Caridad | Love and generosity |
| Carlah | A free person of noble strength. |
| Carlana | A free woman of noble character. |
| Carle | A man who is free and strong. |
| Carlette | A small and free noble woman. |
| Carline | A free woman of noble spirit. |
| Carlinhos | Little Charles, the free man. |
| Carlitos | The little free noble man. |
| Carlla | A variant meaning free man. |
| Carloss | A variant meaning free man. |
| Carmala | A garden or vineyard name. |
| Carmalah | A garden or vineyard name. |
| Carmo | A name meaning garden of God. |
| Carolien | A name meaning free person. |
| Carolin | A name meaning free person. |
| Carper | Occupational surname for a carpenter or woodworker, derived from Old English 'carpere' meaning to cut wood. |
| Carrey | From the river; from the fort on the hill; having dark features |
| Carrizoa | Carrizoa is a Spanish surname derived from 'carrizo,' meaning 'reed' or 'cane,' likely referring to a place name. |
| Carrolyn | Joyous song; a small; strong woman |
| Carrow | Carrow is a surname of Irish origin, meaning 'little castle' or 'fortress'. |
| Carry | From the river; from the fort on the hill; having dark features |
| Carvay | Carvay is a variant of Carvey, derived from the French surname 'Carvet,' meaning 'to carve' or 'woodcutter'. |
| Caryse | A name meaning beloved one. |
| Caryss | One who loves and is loved |
| Carysse | A name meaning beloved one. |
| Casanova | Italian nobleman Giacomo Casanova, known for his numerous love affairs and amorous exploits, the name refers to a charming, seductive, and unfaithful lover. |
| Cashmere | Soft, fine wool obtained from the undercoat of the cashmere goat, native to the Himalayan region. |
| Cashton | Cashton is a variant of Cashton, derived from the Old English words 'cæs' meaning 'brilliant' and 'tun' meaning 'settlement'. |
| Casimer | Casimer is a variant of Casimir, derived from Polish 'Kazimierz', meaning 'keeper of peace'. |
| Casmir | Keeper or destroyer of peace |
| Cassander | Cassander means 'hollow' or 'empty' in Greek, possibly derived from the word 'kassos', meaning hollow. |
| Cassee | A name meaning pure or holy. |
| Cassel | Cassel is a surname of French origin, derived from the Old French word 'cassel,' meaning 'castle' or 'fortress'. |
| Cassini | Italian surname derived from Cassino, a town in Lazio, Italy, meaning 'hollow' or 'valley'. |
| Casson | Derived from a surname meaning hollow. |
| Castiel | Heavenly or celestial being, a guardian angel, or a heavenly messenger. |