| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 321 | Caelan | Irish | Powerful warrior. | M | |
| 322 | Caelin | Irish | Variant of Caelan: Powerful warrior. | M | |
| 323 | Caffar | Irish | Helmet. | M | |
| 324 | Caffara | Irish | Helmet. | F | |
| 325 | Caffaria | Irish | Helmet. | F | |
| 326 | Cagney | Irish | Surname. | M | |
| 327 | Cahal | Irish | Variant of Cathall: Ready for war. | M | |
| 328 | Cahir | Irish | Warrior. | M | |
| 329 | Cahira | Irish | Warrior. | F | |
| 330 | Cailin | Irish | Girl. | F | |
| 331 | Cain | Irish | Archaic. | M | |
| 332 | Cairbre | Irish | Chariot rider. | M | |
| 333 | Caiseal | Irish | From Cashel. | M | |
| 334 | Cait | Irish | Variant of Katherine meaning pure. | F | |
| 335 | Caith | Irish | From the battlefield. | M | |
| 336 | Caitie | Irish | Variant of Katherine meaning pure. | F | |
| 337 | Caitlan | Irish | Variant of Katherine meaning pure. | F | |
| 338 | Caitland | Irish | Variant of Katherine meaning pure. | F | |
| 339 | Caitlin | Irish | Variant of Katherine meaning pure. | F | |
| 340 | Caitlinn | Irish | Variant of Katherine meaning pure. | F | |