| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 1 | Dallas | Celtic | Dwells by the waterfall. | M | |
| 2 | Daman | Celtic | Demon. | M | |
| 3 | Darcy | Celtic | Dark. | M | |
| 4 | Dearg | Celtic | Son of Daghda. | M | |
| 5 | Dermot | Celtic | Free. | M | |
| 6 | Desmond | Celtic | From south Munster. | M | |
| 7 | Devin | Celtic | Poet. | M | |
| 8 | Devyn | Celtic | Poet. | M | |
| 9 | Dewain | Celtic | Song. | M | |
| 10 | Dillion | Celtic | Faithful. | M | |
| 11 | Dinsmore | Celtic | From the hill fort. | M | |
| 12 | Domhnall | Celtic | Stranger. | M | |
| 13 | Don | Celtic | Dark stranger. | M | |
| 14 | Donaghy | Celtic | Strong fighter. | M | |
| 15 | Donal | Celtic | Stranger. | M | |
| 16 | Donald | Celtic | Dark stranger. | M | |
| 17 | Donall | Celtic | Stranger. | M | |
| 18 | Donat | Celtic | Stranger. | M | |
| 19 | Donnally | Celtic | Brave. | M | |
| 20 | Donnchadh | Celtic | Strong fighter. | M | |