| Dinis | | dee-NEES (Portuguese), jee-NEES (Brazilian Portuguese) | Portuguese | |
| Diniz | | - | Portuguese | |
| Diogo | | DYAW-goo (Portuguese), JYAW-goo (Brazilian Portuguese) | Portuguese | |
| DionÍSio | | dee-oo-NEE-zyoo (Portuguese), jee-oo-NEE-zyoo (Brazilian Portuguese) | Portuguese | |
| Domingos | | - | Portuguese | |
| Domitila | | - | Spanish, Portuguese | |
| Donato | | do-NAH-to (Italian, Spanish) | Italian, Spanish, Portuguese | |
| Dores | | DAW-res (Galician) | Portuguese, Galician | |
| DorotÉIa | | - | Portuguese (Brazilian) | |
| Doroteia | | doo-roo-TAY-ə | Portuguese | |
| Du | | - | Portuguese | |
| Duarte | | DWART | Portuguese | |
| Duda | | - | Portuguese | |
| Dudu | | - | Portuguese | |
| Dulce | | DOOL-the (Spanish), DOOL-se (Latin American Spanish) | Spanish, Portuguese | |