D
| Daibhin |
| Daimhin |
| Dainin |
| Daire |
| Daithi |
| Dale |
| Daley |
| Dallan |
| Dalton |
| Damian |
| Damien |
| Damon |
| Dan |
| Danann |
| Danas |
| Danelis |
| Daniel |
| Daniel-george |
| Danielius |
| Daniil |
| Daniko |
| Danilo |
| Danny |
| Dante |
| Dara |
| Darach |
| Daragh |
| Darcey |
| Darcy |
| Darius |
| Darra |
| Darragh |
| Darrah |
| Darren |
| Darryl |
| Darsai |
| Daryl |
| Dathan |
| Davan |
| David |
| Davin |
| Davis |
| Dawid |
| De |
| Deacon |
| Deaglan |
| Dean |
| Declan |
| Deimantas |
| Deivid |
| Deividas |
| Deivids |
| Denas |
| Denis |
| Denver |
| Denzel |
| Deon |
| Dermot |
| Desmond |
| Devan |
| Devin |
| Devon |
| Devyn |
| Dexter |
| Dhruva |
| Dhuvi |
| Diarmuid |
| Diego |
| Dilan |
| Dillon |
| Dio |
| Diogo |
| Dion |
| Divin |
| Doire |
| Dolton-james |
| Domantas |
| Domas |
| Domhnall |
| Dominic |
| Dominick |
| Dominik |
| Dominykas |
| Don |
| Donacha |
| Donal |
| Donnach |
| Donnacha |
| Donnachadh |
| Donncha |
| Donnchadh |
| Douglas |
| Dovydas |
| Drake |
| Drew |
| Dualta |
| Dualtach |
| Dultach |
| Dwayne |
| Dylan |