| Baby Name | Meaning | Gender |
|---|
| Celyddon | Mythical Father Of Culhwch | Male |
| Ceri | Variant Of Cyril. | Female |
| Colwyn | A River In Wales. | Male |
| Cordelia | Of The Sea | Female |
| Cristyn | Variant Of Christian. | Female |
| Culhwch | Arthur's Nephew | Male |
| Dafydd | Variant Of David. Beloved Of God. | Male |
| Dai | Great | Female |
| Darren | Great. See Also Darin. | Male |
| Dee | Abbreviation Of Names Beginning With The Letter D. | Female |
| Derwyn | Friend Of The Deer | Male |
| Deverell | Surnames Derived From Place Name Deverel. | Male |
| Dewey | Place-Name And Surname: Welsh Form Of David. | Male |
| Dilan | Like A Lion. | Male |
| Dillon | Like A Lion. | Male |
| Dona | Lady | Female |
| Drem | Mythical Son Of Dremidydd | Male |
| Drew | Abbreviation Of Andrew. Modern Actress Drew Barrymore. | Female |
| Drystan | An Advisor To Arthur | Male |
| Dyfed | From Dyfed | Male |
| Dylan | Man From The Sea | Male |
| Edwyn | Happy Friend | Male |
| Einion | Anvil | Male |
| Eirlys | Snow Drop | Female |
| Elan | Friendly | Male |