| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 41 | Caileigh | Gaelic | Slender. Variant of Caley or Cailley: (French) 'from the forest. | F | |
| 42 | Cailin | Gaelic | Girl; lass. | F | |
| 43 | Cailley | Gaelic | Slender. Variant of Caley or Cailley: (French) 'from the forest. | F | |
| 44 | Cailyn | Gaelic | Girl; lass. | F | |
| 45 | Cairistiona | Gaelic | Christian. | F | |
| 46 | Cait | Gaelic | Pure. | F | |
| 47 | Caitlin | Gaelic | Pure. An Irish Gaelic variant of Catherine from the Old French form of the name. | F | |
| 48 | Caitrin | Gaelic | Form of the Greek Catherine meaning 'pure'. | F | |
| 49 | Caleigh | Gaelic | Slender. Variant of Caley or Cailley: (French) 'from the forest. | F | |
| 50 | Callan | Gaelic | Powerful in battle. | F | |
| 51 | Callee | Gaelic | Variant of Cayley meaning from the forest. | F | |
| 52 | Callen | Gaelic | Powerful in battle. | F | |
| 53 | Calli | Gaelic | Variant of Cayley meaning from the forest. | F | |
| 54 | Callie | Gaelic | Variant of Cayley meaning from the forest. | F | |
| 55 | Calynn | Gaelic | Powerful in battle. | F | |
| 56 | Carling | Gaelic | Little champion. | F | |
| 57 | Casey | Gaelic | Brave. | F | |
| 58 | Casidhe | Gaelic | Dever. | F | |
| 59 | Cassidy | Gaelic | Dever. | F | |
| 60 | Cathasach | Gaelic | Brave. | F | |