| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 201 | Crisdean | Gaelic | Christ bearer. | M | |
| 202 | Cronan | Gaelic | Dark brown. | M | |
| 203 | Cuilean | Gaelic | Cub. | M | |
| 204 | Cuinn | Gaelic | Wise. | M | |
| 205 | Cullan | Gaelic | Handsome. | M | |
| 206 | Cullen | Gaelic | Handsome; good-looking lad. | M | |
| 207 | Culley | Gaelic | Dwells at the woodland. | M | |
| 208 | Cullin | Gaelic | Variant of Cullen: Handsome; good-looking lad. | M | |
| 209 | Cully | Gaelic | Handsome or dwells at the woodland. | M | |
| 210 | Cunningham | Gaelic | Village that has a milk pail. | M | |
| 211 | Curadhan | Gaelic | Hero. | M | |
| 212 | Curney | Gaelic | Hero. | M | |
| 213 | Curr | Gaelic | Hero. | M | |
| 214 | Curran | Gaelic | Hero; Dagger. | M | |
| 215 | Currie | Gaelic | Dagger. | M | |
| 216 | Curry | Gaelic | Dagger. | M | |
| 217 | Dace | Gaelic | Diminutive of Dacey: From the south. | M | |
| 218 | Dacey | Gaelic | Southerner. | M | |
| 219 | Dacia | Gaelic | Variant of Dacey: From the south. | M | |
| 220 | Dacian | Gaelic | Variant of Dacey: From the south. | M | |