| Name |
Pronunciation |
Meaning |
English Spelling |
Gender |
| Dagán, Daghán | (DAG-awn) | good | | M |
| Dagain, Daghain | (DAY-en) | good | | F |
| Daig, Daigh | (DAY) | flame, fire | Day | M |
| Daigre, Daighre | (DAY-ree) | flame, fire | Derry | M |
| Daimíne, Daiméne, Daimhín | (duv-EEN) | a deer, an ox | Devin, Devine | M |
| Dáire | (DAW-ree) | fruitful | | M |
| Dáirine | (daw-REEN) | derived from Dáire | Doreen | F |
| Dálach | (DAW-lach) | surrounded by many people | Dalaigh, Daly | M |
| Dalbach, Dalbhach | (DAL-vach) | full of sorcery | | M |
| Dallán | (dal-AWN) | blind | Dallan | M |
| Damán, Damhán | (dav-AWN) | little stag, little ox | Davin, Davan | M |
| Damnat, Damhnait | (DAV-nit) | fawn, little deer | | F |
| Daniél | (DAN-yel) | borrowing of Biblical Daniel | | M |
| Danu, Dana | (DAN-a) | wealth, abundance | | F |
| Dathal | (DAW-hawl) | swift, nimble | Dahal | M |
| Daui, Dau, Dui, Duach | (DOW) | | | M |
| Dauíd, Daibhead | (DAYV-id) | borrowing of David | | M |
| Dáibhí | (DAY-vee) | dim. of David | | M |
| Declán, Deaglán | (DEY-glawn) | | Declan | M |
| Delbnat, Dealbhnait | (DELV-nit) | shape | | F |
| Della, Dealla | (DEL-la) | | | F |
| Demmán, Deamán | (da-MAWN) | | | M |
| Der Áine, Daráine | (der-AW-ney) | daughter of Áine | | F |
| Der Bile, Dar Bile, Deirbhile | (DER-vil-a) | | Dervla | F |
| Derbáil, Der Bfáil, Dearbháil | (der-VAWL) | daughter of Fál(legendary name of Ireland) | | F |
| Derbiled, Dar Filed, Deirbhile, Dairile | (der-VEEL-a,der-EEL-a) | daughter of a poet | | F |
| Derdriu, Deirdre | (DEER-dra) | | | F |
| Der Erca, Dar Erca, Darearca | (der-ARK-a) | daughter of Erc | | F |
| Der Finn, Dar Finn, Delrbhinn, Dairinn | (DER-vin, DAR-in) | daughter of Finn | | F |
| Der Bforgaill, Dearbhorgaill | (DEV-or-gil) | daughter of Forgall | | F |
| Der Luca, Dar Luga, Dearlogha, Dearlú | (dar-LOO) | daughter of Lugh | Darla | F |
| Der Lugach, Der Lugdach, Dearluach | (dar-LOO-ach) | daughter of Lugaid | | F |
| Der Óma, Dar Óma | (der-OWV-a) | daughter of Ogmios | Darova | F |
| Desmumhnach | (DAS-oon-ach) | | Deasún | M |
| Dianach | (dee-UN-ak) | swift | | M |
| Dianaim, Dianaimh | (de-UN-uv) | flawless | | F |
| Diarmait, Diarmaid | (DER-mit) | | Dermot, Darby | M |
| Díchú, Díochú | (DEE-koo) | | | M |
| Dicnat, Dignait | (DIG-nit) | | | F |
| Dícuill | (DEE-kil) | | | M |
| Dígde, Díge, Díghe, Dí | (DEE) | | | F |
| Díglach, Díolach | (DEEL-ach) | champion | | M |
| Dímmae, Dímma, Díoma | (DEE-ma) | pet-form of Diarmait | | M |
| Dímmán, Díomán | (DEE-mawn) | dim. of Diarmait | | M |
| Dínertach, Díneartach | (DEE-nar-tach) | of great strength | Dinnerty | M |
| Dímmasach, Díomasach | (DIM-as-ach) | | Diomasaigh, Dempsey | M |
| Doirend, Dairenn, Doireann | (DOR-en) | | Dorren | F |
| Domnall, Domhnall, Dónal | (DOH-nal) | world-mighty | | M |
| Donn | (dun) | dun, brown, or lord | | M |
| Donnán | (dun-AWN) | dim. of Donn | | M |
| Donnchad, Donnchadh, Donncha | (DUN-a-ka) | from Donn | Donough, Donagh | M |
| Donnucán, Donnagán | (DUN-a-gawn) | dim. of Donn | Donegan | M |
| Donncuan | (dun-KOO-an, dun-KOON) | brown + cú "wolf" | | M |
| Donngal, Donnghal | (DUN-gal, DUN-eel) | of princely or kingly valour | Donnelly | M |
| Donn Slébe, Doinnlé | (dun-LEE-vey, DUN-lee) | | Dunleavy | M |
| Donndubán, Donnubán, Donnabhán | (DUN-av-awn) | dark, brown person | Donnabháin, Donovan | M |
| Draigen, Draighean | (DREYN) | | | M |
| Duarcán | (door-KAWN) | sad, melancholy | Durkan, Dorcan, Durkin | M |
| Duaibsech, Duaibseach | (DOOV-sech) | sad, melancholy | | F |
| Dubacán, Dubhagán | (DOO-gawn) | little dark lad | Doogan, Duggan | M |
| Dubaltach, Dubhaltach, Dualtach | (DOO-al-tach) | | Dewald | M |
| Dubán, Dubhán | (doo-AWN) | dark-haired person | Dwane | M |
| Dubcenn, Dubgenn, Duibhgenn, Duígeann | (DEE-gan) | black-haired person | Deegan | M |
| Dubchoblaig, Dubchoblaigh | (doo-KUL-ey) | | | F |
| Dubdae, Dubhda | (DOO-da) | | Dowd | M |
| Dub dá Lethe | (doov-DAW-ley) | | | M |
| Dub Essa, Dubh Essa, Duibheasa | (duv-AS-a) | lady of the waterfall | | F |
| Dubgall, Dubhghall | (DOO-gal) | dark stranger | Dougal | M |
| Dubgilla, Duibhghiolla | (DUV-il-la) | dark child | | M/F |
| Dub Lemna, Duibleamhna | (div-LOW-na) | dark lady of Lemain | | F |
| Dubthach, Dubhthach, Dufach | (DOO-fach) | dark, black | Dubhthaigh, Duffy | M/F |
| Duinnchaid, Duinneacha | (DIN-ach-a) | | Duinneacha, Dennehy | M |
| Dúinsech, Dúinseach | (DOON-sach) | fem. form of Dúnán | | F |
| Duinnín | (din-EEN) | dim. of Donn | Duinnín, Dineen | M |
| Dúnacán, Dúnagán | (DOON-a-gawn) | | Donegan | M |
| Dúnadach Dúnadhach | (DOON-ach) | leader | Dúnahaigh, Donahey, Downey | M |
| Dúnán | (DOON-awn) | | Dúnáin, Doonan | M |
| Dúnchad, Dúnchadh | (DOON-cha) | dún a fortress, cath battle | | M |
| Dúnchán | (DOON-kawn) | dim. of Dúnchad | | M |
| Dúngal, Dúnghal | (DOON-gal, DOON-yel) | from dún, a fortress | | M |
| Dúnlaith | (DOON-la) | lady of the fortress | Dunla | F |
| Dúnlang | (DOON-lang) | | Dúnlaing, Dowling | M |