| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 301 | Donal | Celtic | Stranger. | M | |
| 302 | Donald | Celtic | Dark stranger. | M | |
| 303 | Donall | Celtic | Stranger. | M | |
| 304 | Donat | Celtic | Stranger. | M | |
| 305 | Donella | Celtic | Dark - haired elfin girl. | F | |
| 306 | Donia | Celtic | Dark - skinned. | F | |
| 307 | Donnally | Celtic | Brave. | M | |
| 308 | Donnchadh | Celtic | Strong fighter. | M | |
| 309 | Donnelly | Celtic | Brave. | M | |
| 310 | Donogb | Celtic | Strong fighter. | M | |
| 311 | Donovan | Celtic | Strong fighter. | M | |
| 312 | Doran | Celtic | Stranger. | M | |
| 313 | Doreen | Celtic | Moody. | F | |
| 314 | Doreena | Celtic | Moody. | F | |
| 315 | Dorran | Celtic | Stranger. | M | |
| 316 | Dosne | Celtic | From the sand hill. | M | |
| 317 | Dougal | Celtic | Dark stranger. | M | |
| 318 | Doughal | Celtic | Dark stranger. | M | |
| 319 | Doughlas | Celtic | Dwells by the dark stream. | M | |
| 320 | Douglas | Celtic | Dwells by the dark stream. | M | |