| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 201 | Cathmor | Gaelic | Great warrior. | M | |
| 202 | Cathmore | Gaelic | Great warrior. | M | |
| 203 | Cathrine | Gaelic | Form of the Greek Catherine meaning pure. | F | |
| 204 | Catriona | Gaelic | Pure, clear. A Scottish Gaelic variant of 'Catherine', which is the French form of the Latin 'Katharina', from the Greek Aikaterina'. Famous bearer: the heroine of 19th century author Robert Louis Stevenson's novel 'Catriona'. | F | |
| 205 | Cavan | Gaelic | Handsome. | M | |
| 206 | Cayla | Gaelic | Slender. Variant of Caley or Cailley: (French) 'from the forest. | F | |
| 207 | Caylee | Gaelic | Slender. Variant of Caley or Cailley: (French) 'from the forest. | F | |
| 208 | Cayley | Gaelic | Slender. Variant of Caley or Cailley: (French) 'from the forest. | F | |
| 209 | Caylie | Gaelic | Slender. Variant of Caley or Cailley: (French) 'from the forest. | F | |
| 210 | Caylin | Gaelic | Girl; lass. | F | |
| 211 | Ceallach | Gaelic | Warrior maid. | F | |
| 212 | Ceallach | Gaelic | Warrior. | M | |
| 213 | Ceannfhionn | Gaelic | Blond. | M | |
| 214 | Ceara | Gaelic | Spear. | F | |
| 215 | Cearbhallan | Gaelic | Small champion. | M | |
| 216 | Cearnach | Gaelic | Victorious. | M | |
| 217 | Ceileachan | Gaelic | Little champion. | M | |
| 218 | Cein | Gaelic | Ancient. | M | |
| 219 | Ceit | Gaelic | Pure. | F | |
| 220 | Cerin | Gaelic | Little dark one. | M | |