| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 221 | Duffey | Celtic | Variant of Duff: Dark-skinned. | M | |
| 222 | Duffy | Celtic | Variant of Duff: Dark-skinned. | M | |
| 223 | Dughall | Celtic | Dark stranger. | M | |
| 224 | Duncan | Celtic | Dark skinned fighter. | M | |
| 225 | Dunham | Celtic | Dark skinned fighter. | M | |
| 226 | Dunley | Celtic | From the hill meadow. | M | |
| 227 | Dwayne | Celtic | Song. | M | |
| 228 | Dyfed | Celtic | From Dyfed. | M | |
| 229 | Ea | Celtic | Fire. | M | |
| 230 | Eburscon | Celtic | Lives near the yew tree estate. | M | |
| 231 | Edan | Celtic | Fire. | M | |
| 232 | Efnisien | Celtic | Mythical son of Euroswydd. | M | |
| 233 | Egan | Celtic | Ardent. | M | |
| 234 | Eghan | Celtic | Ardent. | M | |
| 235 | Einion | Celtic | Anvil. | M | |
| 236 | Elgin | Celtic | 'Noble; white.'. | M | |
| 237 | Elgine | Celtic | 'Noble; white.'. | M | |
| 238 | Elidor | Celtic | Mythical monk. | M | |
| 239 | Eljin | Celtic | 'Noble; white.'. | M | |
| 240 | Emrys | Celtic | Celtic form of Ambrose. | M | |