| Dougherty | Variant of Doherty: Wicked. |
| Douglas | Dwells by the dark stream; Dweller by the dark stream; Dark water. In the seventeenth century, this name was as popular for girls as for boys.; Dark stranger; From the dark river. The Scottish Douglas clan had two historical branches: (Black Douglases and |
| Dow | A name meaning a dove or bird. |
| Dowan | A name meaning a darkhaired one. |
| Dowle | A name meaning a small valley. |
| Downeti | A name meaning a quiet spirit. |
| Downett | A name meaning a little hill. |
| Duana | Feminine of Duane. Dark |
| Duante | Dark. Many Irish and Scottish names have the meaning dark or black. |
| Duayna | Feminine of Duane. |
| Duayne | Dark. Many Irish and Scottish names have the meaning dark or black. |
| Dubg | A name meaning a darkhaired person. |
| Dubhagain | Descendant of the dark one. |
| Dubhain | A small, darkhaired person. |
| Dubhan | Little dark or blackhaired one. |
| Dubheasa | Dark or mysterious promise. |
| DubhgMl | A dark and noble warrior. |
| Duggan | An Irish surname meaning a darkhaired man. |
| Dughlas | Variant of Dubhglas: Black and gray. |
| Duvessa | A name meaning dark beauty. |
| Duwayne | Dark. Many Irish and Scottish names have the meaning dark or black. |
| Dwain | Derived from a word meaning small. |
| Dwaine | A name meaning dark or swarthy one. |
| Dwane | A name meaning little dark one. |
| Dwayne | One who is dark or swarthy |
| Dwyer | A descendant of the dark one. |
| Dyfan | day or constant |
| Dylen | A name meaning born of the ocean. |
| Dymphna | A name meaning little fawn or poet. |
| Dympna | Name of a saint |
| Eachan | A Gaelic name meaning little horse. |
| Eadbard | Variant of Eadbhard: Rich protector. |
| Eadbhard | Rich protector. |
| Eagan | Fiery: forceful. |
| Eagon | A name meaning a strong warrior. |
| Ealga | An ancient name meaning the noble. |
| Eames | Prosperous protector. Variant of Edmund. |
| Earc | A name meaning spotted or speckled. |
| Earnan | A name meaning little iron or eagle. |
| Eason | "Protector, great one." |