| Culkin | A very learned man |
| Cumhur | From the people |
| Curley | A man; freeman; peasant |
| Currer | Derived from the Old French word 'courre,' meaning to run or flow, likely referring to a flowing or running stream. |
| Cuthberta | Famous and bright brilliance |
| Cye | A name meaning sun or sky |
| Cylar | Cylar is a variant of the name Cyril, meaning 'lordly' or 'noble' in Greek origin. |
| Cyler | Cycler refers to a person who rides a bicycle, or a person who cycles through various stages or phases. |
| Cynthiaa | A reference to the greek moon goddess; artemis |
| Cynthya | Woman from Mount Cynthus |
| Cynthyah | Moon goddess of the mountain |
| Cypher | A secret code or message, especially one that is difficult to decipher or understand. |
| Cypress | Strong; muscular; adaptable |
| Cypriane | One from the island Cyprus |
| Cyprianne | Native of the island Cyprus |
| Cyrie | Derived from the word for lord |
| Cyruss | Derived from the word for sun |
| Czedale | Czedale is a Polish surname, derived from the word 'część', meaning 'a part' or 'a share'. |
| D | The fourth letter of alphabet |
| Daaron | A great man; a gift from god |
| Dackota | Derived from a tribe meaning friendly ally. |
| Dade | Dade is a surname of Basque origin, meaning 'warrior' or 'bringer of victory'. |
| Daelen | A modern name meaning from the valley. |
| Daemean | Damian; Damien; Damon; Damion; Dameon; Damen; Daemon; Damani; Demian; Daymon; Daymian; Daymien |
| Daesha | A name meaning a gift from the heavens. |
| Daevon | Daevon is a variant of David, meaning 'beloved' or 'friend of God' in Hebrew origin. |
| Daewon | A Korean name meaning great or big source. |
| Dagfinn | Man from Finland; day |
| Dagman | A name of Norse origin meaning day man. |
| Dagmara | A name of Slavic origin meaning day glory. |
| Dahiana | A divine and heavenly gift. |
| Dahrah | Compassion; tree |
| Dahril | One who is beloved and dear. |
| Daily | Someone constant and steady. |
| Dainen | Dainen is a Tibetan Buddhist name meaning 'virtuous' or 'good' and is often given to monks. |
| Daisley | Daisley is a Scottish surname derived from the Gaelic 'daiseal,' meaning 'dairy' or 'place of milk'. |
| Daiton | From the town of the valley. |
| Daividh | A beloved and cherished soul. |
| Dakari | Dakari means 'traveler' or 'wanderer' in Swahili, a Bantu language spoken in East Africa. |
| Dakoda | Allies; to be thought of as friends |