| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 221 | Dacy | Gaelic | Southerner. | M | |
| 222 | Daeg | Gaelic | Black-haired. | M | |
| 223 | Daegan | Gaelic | Black-haired. | M | |
| 224 | Dagen | Gaelic | Black-haired. | M | |
| 225 | Daibhidh | Gaelic | Beloved. | M | |
| 226 | Daimhin | Gaelic | Servant. | M | |
| 227 | Dall | Gaelic | Wise. | M | |
| 228 | Dallas | Gaelic | Wise. | M | |
| 229 | Daly | Gaelic | Counselor. | M | |
| 230 | Dany | Gaelic | Dark. | M | |
| 231 | Dar | Gaelic | Dark. | M | |
| 232 | Daran | Gaelic | Variant of Darren: Great. | M | |
| 233 | Darby | Gaelic | Free man. | M | |
| 234 | Darce | Gaelic | Dark. | M | |
| 235 | Daren | Gaelic | Variant of Darren: Great. | M | |
| 236 | Daric | Gaelic | Strong; oak-hearted. See also Derek. | M | |
| 237 | Darick | Gaelic | Strong; oak-hearted. See also Derek. | M | |
| 238 | Darin | Gaelic | Variant of Darren: Great. | M | |
| 239 | Daron | Gaelic | Great. | M | |
| 240 | Darran | Gaelic | Variant of Darren: Great. | M | |