| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 501 | Dorran | Irish | Variant of Doran: Stranger. | M | |
| 502 | Dorrance | Irish | Variant of Dorran 'stranger.'. | M | |
| 503 | Dorrel | Irish | Variant of Dorran 'stranger.'. | M | |
| 504 | Dorrell | Irish | Variant of Dorran 'stranger.'. | M | |
| 505 | Dorren | Irish | Variant of Dorran 'stranger.'. | M | |
| 506 | Dorrin | Irish | Variant of Dorran 'stranger.'. | M | |
| 507 | Dougal | Irish | From the Gaelic dubhgall, meaning dark stranger. Daugal was the nickname the Irish gave to the Vikings. | M | |
| 508 | Dougan | Irish | Variant of Dugan: Swarthy. | M | |
| 509 | Douggan | Irish | Variant of Dugan: Swarthy. | M | |
| 510 | Dougherty | Irish | Variant of Doherty: Wicked. | M | |
| 511 | Douglas | Irish | Dark stranger. | M | |
| 512 | Dow | Irish | Dark-haired. | M | |
| 513 | Dowan | Irish | Black. | M | |
| 514 | Dowle | Irish | Dark stranger. | M | |
| 515 | Doyle | Irish | Dark stranger. | M | |
| 516 | Driscol | Irish | Mediator. | M | |
| 517 | Driscoll | Irish | Mediator. | M | |
| 518 | Duane | Irish | From an Irish surname meaning black or dark. Many Irish and Scottish names have the meaning 'dark' or 'black.'. | M | |
| 519 | Duante | Irish | Dark. Many Irish and Scottish names have the meaning 'dark' or 'black.'. | M | |
| 520 | Duayne | Irish | Dark. Many Irish and Scottish names have the meaning 'dark' or 'black.'. | M | |