| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Darragh | - | Irish | ||
| DearbhÁIl | - | Irish | ||
| DeasÚN | - | Irish | ||
| Declan | - | Irish | ||
| Deirbhile | - | Irish | ||
| Deirdre | DEER-drə (English), DEER-dree (English), DER-dre (Irish) | English, Irish, Irish Mythology | ||
| Delma | DEL-mə (English) | Irish, English | ||
| Derdriu | - | Irish Mythology | ||
| Dermot | - | Irish | ||
| Derry | - | Irish | ||
| Derval | - | Irish | ||
| Dervila | - | Irish | ||
| Dervla | - | Irish | ||
| Desmond | DEZ-mənd | English, Irish | ||
| Devin | DEV-in | English, Irish |