| Name | Meaning | Gender | Origin |
|---|
| Daley | assembly, gathering | Male | Irish |
| Damon | constant, day | Male | English |
| Dara | compassion, wisdom, angel of rains and rivers | Male | Irish |
| Darach | Oak
| Male | |
| Darby | from the deer estate | Male | Irish |
| Darcy | from Arcy | Male | English |
| Deirdre | sorrowful | Female | Irish |
| Delaine | From the elder tree grove.
| Male | |
| Delancy | From the elder tree grove.
| Male | |
| Delane | From the elder tree grove.
| Male | |
| Delaney | From the elder tree grove.
| Female | Irish |
| Delanie | Challenger
| Female | |
| Delano | From the elder tree grove.
| Male | |
| Dempsey | From the judge's meadow
| Male | Irish |
| Deoradhain | Exile
| Male | |
| Derforgal | Servant of Dervor
| Female | |
| Derforgala | Servant of Dervor
| Female | |
| Derry | great lover, an ancient hero | Male | Irish |
| Desmond | man of the world, society | Male | Irish |
| Devin | poet | Male | Irish |
| Devlin | unlucky | Male | Irish |
| Donovan | dark | Male | Irish |
| Dougal | Black stranger | Male | Scottish |
| Doyle | black stranger | Male | Irish |
| Duane | dark, from the dunes | Male | Irish |