| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 181 | Byme | Irish | Bear; brown. | M | |
| 182 | Cacanisius | Irish | Son of Nis. | M | |
| 183 | Cace | Irish | Variant of Casey: Observant; alert; vigorous. | M | |
| 184 | Cacey | Irish | Variant of Casey: Observant; alert; vigorous. | M | |
| 185 | Cadhla | Irish | Handsome. | M | |
| 186 | Caelan | Irish | Powerful warrior. | M | |
| 187 | Caelin | Irish | Variant of Caelan: Powerful warrior. | M | |
| 188 | Caffar | Irish | Helmet. | M | |
| 189 | Cagney | Irish | Surname. | M | |
| 190 | Cahal | Irish | Variant of Cathall: Ready for war. | M | |
| 191 | Cahir | Irish | Warrior. | M | |
| 192 | Cain | Irish | Archaic. | M | |
| 193 | Cairbre | Irish | Chariot rider. | M | |
| 194 | Caiseal | Irish | From Cashel. | M | |
| 195 | Caith | Irish | From the battlefield. | M | |
| 196 | Calbhach | Irish | Bald. | M | |
| 197 | Caley | Irish | Slim; slender. | M | |
| 198 | Calhoun | Irish | From the narrow forest. Surname. | M | |
| 199 | Calin | Irish | Variant of Caelan: Powerful warrior. | M | |
| 200 | Callaghan | Irish | Strife. Saint Callaghan was an Irish saint. | M | |