| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 661 | Darrah | Irish | Variant of Darragh: Black oak; wealthy. | M | |
| 662 | Darrick | Irish | Strong; oak-hearted. See also Derek. | M | |
| 663 | Darrie | Irish | Red-haired. | M | |
| 664 | Darroch | Irish | Strong; oak-hearted. See also Derek. | M | |
| 665 | Darrock | Irish | Strong; oak-hearted. See also Derek. | M | |
| 666 | Darry | Irish | Red-haired; wealthy. | M | |
| 667 | Darsey | Irish | Variant of Darcy: Dark one. | M | |
| 668 | Darsy | Irish | Variant of Darcy: Dark one. | M | |
| 669 | Dary | Irish | Wealthy. | M | |
| 670 | Davey | Irish | Variant of David 'beloved.'. | M | |
| 671 | Davie | Irish | Variant of David 'beloved.'. | M | |
| 672 | Dawayne | Irish | Dark. | M | |
| 673 | Deaclan | Irish | Variant of Declan: Famous bearer: 6th century Irish St. Declan. | M | |
| 674 | Deaglan | Irish | Name of a saint. | M | |
| 675 | Dearbhail | Irish | True desire. | F | |
| 676 | Decla | Irish | Feminine form of Declan the name of a saint. | F | |
| 677 | Declan | Irish | Famous bearer: 6th century Irish St. Declan. | M | |
| 678 | Dedre | Irish | Sorrowful. | F | |
| 679 | Deedra | Irish | Melancholy. A variant of the older name Deirdre. In Celtic legend Deirdre died of a broken heart. | F | |
| 680 | Deegan | Irish | Black-haired. | M | |