| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 201 | Callahan | Irish | Surname. | M | |
| 202 | Callough | Irish | Bald. | M | |
| 203 | Callum | Irish | Variant of Columba, a Latin name meaning dove. | M | |
| 204 | Calum | Irish | Variant of Columba, a Latin name meaning dove. | M | |
| 205 | Calvagh | Irish | Bald. | M | |
| 206 | Caly | Irish | Slender. | M | |
| 207 | Camey | Irish | Champion. | M | |
| 208 | Camy | Irish | Variant of Camey: Champion. | M | |
| 209 | Canice | Irish | Good-looking; handsome. | M | |
| 210 | Caoimhghin | Irish | Variant of Caoimhin: Noble. | M | |
| 211 | Caoimhin | Irish | Noble. | M | |
| 212 | Caolaidhe | Irish | Slender. | M | |
| 213 | Caolan | Irish | Slender. | M | |
| 214 | Caomh | Irish | Lovable. | M | |
| 215 | Carey | Irish | Of the dark ones. A variant of Cary in use since the 19th century. | M | |
| 216 | Carlin | Irish | Little champion. | M | |
| 217 | Carney | Irish | Champion; victorious. | M | |
| 218 | Carny | Irish | Variant of Carney: Champion; victorious. | M | |
| 219 | Carraig | Irish | From the rocky headland. | M | |
| 220 | Carrick | Irish | From the rocky headland. | M | |