| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Dougal | - | Scottish, Irish | ||
| Doyle | - | Irish | ||
| Driscoll | DRIS-kəl | English (Rare), Irish | ||
| Duane | DWAYN, də-WAYN | English, Irish | ||
| DubhÁN | - | Irish | ||
| Dubhghall | - | Irish, Scottish | ||
| DubhshlÁIne | - | Ancient Irish | ||
| Dubhthach | - | Ancient Irish | ||
| Dymphna | DIMF-na | Irish | ||
| Dympna | - | Irish | ||
| EÓGan | - | Ancient Irish, Irish Mythology | ||
| Eachann | - | Scottish, Irish | ||
| Eadan | - | Irish | ||
| EadbhÁRd | - | Irish | ||
| Eamon | - | Irish |