| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 301 | Drummond | Scottish | At the ridge. | M | |
| 302 | Dubh | Scottish | Black. | M | |
| 303 | Dubhghall | Scottish | Stranger with dark hair. | M | |
| 304 | Dubhglas | Scottish | From the darkwater. | M | |
| 305 | Duff | Scottish | Black. | M | |
| 306 | Dugal | Scottish | Variant of Dougal: Dark-skinned stranger. | M | |
| 307 | Dugald | Scottish | Variant of Dougal: Dark-skinned stranger. | M | |
| 308 | Dugall | Scottish | Variant of Dougal: Dark-skinned stranger. | M | |
| 309 | Dun | Scottish | Diminutive of Duncan: Brown-skinned soldier. | M | |
| 310 | Duncan | Scottish | From the Irish name Donnchadh, meaning brown warrior. Famous bearer: The Scottish king Duncan I was murdered by Macbeth in 1040. | M | |
| 311 | Dune | Scottish | Diminutive of Duncan: Brown-skinned soldier. | M | |
| 312 | Dunlop | Scottish | Muddy hill. | M | |
| 313 | Dunmor | Scottish | From the great hill fortress. | M | |
| 314 | Dunmore | Scottish | From the great hill fortress. | M | |
| 315 | Dunn | Scottish | Diminutive of Duncan: Brown-skinned soldier. | M | |
| 316 | Dunne | Scottish | Variant of Dunn: Brown. | M | |
| 317 | Durell | Scottish | King's doorman. | M | |
| 318 | Eairrdsidh | Scottish | Truly brave. | M | |
| 319 | Eairrsidh | Scottish | Variant of Eairrdsidh: Truly brave. | M | |
| 320 | Eallair | Scottish | Monastery's steward. | M | |