| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 381 | Duffy | Gaelic | Dark skinned. | M | |
| 382 | Dugald | Gaelic | Dark stranger. | M | |
| 383 | Dugan | Gaelic | Dark skinned. | M | |
| 384 | Dughall | Gaelic | Dark stranger. | M | |
| 385 | Duncan | Gaelic | Dark warrior 'Brown-haired.'. | M | |
| 386 | Dymphna | Gaelic | Little poet. | F | |
| 387 | Eachann | Gaelic | Steadfast. | M | |
| 388 | Eachthighearn | Gaelic | Horse lord. | M | |
| 389 | Ealadhach | Gaelic | Genius. | M | |
| 390 | Ealasaid | Gaelic | Devoted to God. | F | |
| 391 | Ealuvig | Gaelic | Ruler of the home. | M | |
| 392 | Eaman | Gaelic | Earnest. | M | |
| 393 | Eamon | Gaelic | Rich protector. | M | |
| 394 | Eamonn | Gaelic | Rich protector. | M | |
| 395 | Eanrin | Gaelic | Handsome. | M | |
| 396 | Edana | Gaelic | Fiery. | F | |
| 397 | Egan | Gaelic | Young fighter. | M | |
| 398 | Egann | Gaelic | Variant of Egan: Fire. | M | |
| 399 | Egon | Gaelic | Young fighter. | M | |
| 400 | Eideann | Gaelic | Fiery. | F | |