| Cache | A hidden store of supplies. |
| Caden | Little fighter. |
| Cailsey | Cailsey is a variant of Casey, derived from the Gaelic name Cathasaigh, meaning 'bringer of victory'. |
| Caltha | Derived from the yellow flower. |
| Cambrie | A variation of the name Cambria. |
| Camelai | A variant of the flower name Camellia. |
| Camera | Latin term meaning a vaulted chamber. |
| Candid | Meaning honest and sincere in nature. |
| Candy | Bright, Sweet; Diminutive of Candace: Famous bearer: American actress Candice Bergen.; Diminutive of Candida: Dazzling white. Bright, glowing white. Derived from the feminine of the Latin adjective meaning white. Famous bearer: George Bernard Shaw's 1898 |
| Canika | A name meaning a small flower. |
| Canowicakte | Sioux name meaning forest hunter. |
| Canta | A word meaning to sing in Latin. |
| Carha | A name meaning a beloved, dear person. |
| Carlynda | Strong and beautiful |
| Carnelian | A stone of a reddish brown hue. |
| Carrieann | Gracious and womanly |
| Carsyn | A modern spelling of son of Carr. |
| Cashesegra | Osage name meaning tracks of a large animal. |
| Casie | "Same as the other Casey, Kacee, KC names I guess" |
| Casilda | A maiden of the battle or fortress. |
| Cassara | Prophet/princess |
| Catori | A spirit of the birds. |
| Ceasar | A name meaning a hairy or longhaired. |
| Cetanwakuwa | Sioux name meaning attacking hawk. |
| Ceteria | A name meaning a bright star. |
| Chael | Derived from the name Michael. |
| Chailyn | Life, waterfall |
| Chakaluka | Brilliant energy |
| Chalsie | A name meaning a port or landing place. |
| Chamomile | A plant with small daisy flowers. |
| Chankoowashtay | Good road (Sioux) |
| Channery | A person who makes channels. |
| Chansomps | Locust (Algonquin) |
| Chantoya | A name meaning singing joy. |
| Chapawee | A person who is very brave. |
| Charisa | A name meaning grace or kindness. |
| Charleigh | A free person from the meadow |
| Chaska | Sioux name given to the first son born. |
| Chassidy | Pure, virtuous, and innocent. |
| Chatima | A person who is very radiant. |