- Name - DAIRE
Meaning - ANCIENT IRISH
- Name - DAMAN
Meaning - DEMON
- Name - DANNY
Meaning - FROM THE NAME DANIE
- Name - DARCY
Meaning - DARK
- Name - DARIN
Meaning - PRECIOUS PRESENT
- Name - DARRIN
Meaning - FROM THE NAME DARRE
- Name - DARRION
Meaning - FROM THE NAME DARREN
- Name - DEARG
Meaning - SON OF DAGHDA
- Name - DERMOT
Meaning - FREE OF ENVY
- Name - DERMOT
Meaning - FREE
- Name - DERRY
Meaning - GREAT LOVER
- Name - DESMOND
Meaning - FROM SOUTH MUNSTER
- Name - DESMOND
Meaning - MAN OF THE WORLD
- Name - DEVIN
Meaning - POET
- Name - DEVYN
Meaning - POET
- Name - DEWAIN
Meaning - SONG
- Name - DILLAN
Meaning - FORM OF DILLO
- Name - DILLION
Meaning - FAITHFUL
- Name - DINSMORE
Meaning - FROM THE HILL FORT
- Name - DOLAN
Meaning - DARK HAIRED
- Name - DOMHNALL
Meaning - STRANGER
- Name - DON
Meaning - DARK STRANGER
- Name - DON
Meaning - WORLD LEADER
- Name - DONAGH
Meaning - BROWN WARRIOR
- Name - DONAGHY
Meaning - STRONG FIGHTER
- Name - DONAL
Meaning - WORLD LEADER
- Name - DONAL
Meaning - STRANGER
- Name - DONALD
Meaning - DARK STRANGER
- Name - DONALL
Meaning - STRANGER
- Name - DONAT
Meaning - STRANGER
- Name - DONNALLY
Meaning - BRAVE
- Name - DONNAN
Meaning - BROWN
- Name - DONNCHADH
Meaning - STRONG FIGHTER
- Name - DONNEL
Meaning - WORLD LEADER
- Name - DONNELLY
Meaning - A BRAVE BLACK MAN
- Name - DONNELLY
Meaning - BRAVE
- Name - DONNY
Meaning - WORLD LEADER
- Name - DONOGB
Meaning - STRONG FIGHTER
- Name - DONOVAN
Meaning - STRONG FIGHTER
- Name - DORAN
Meaning - STRANGER
- Name - DORRAN
Meaning - STRANGER
- Name - DOSNE
Meaning - FROM THE SAND HILL
- Name - DOUG
Meaning - FROM THE NAME DOUGLA
- Name - DOUGAL
Meaning - DARK STRANGER
- Name - DOUGHAL
Meaning - DARK STRANGER
- Name - DOUGLASS
Meaning - FROM THE NAME DOUGLA
- Name - DOY
Meaning - DARK STRANGER
- Name - DOYLE
Meaning - DARK STRANGER
- Name - DRISCOL
Meaning - INTERPRETER
- Name - DRISCOLL
Meaning - INTERPRETER
- Name - DRISKELL
Meaning - INTERPRETER
- Name - DRUCE
Meaning - DRUID
- Name - DRUCE
Meaning - WISE
- Name - DRUDWYN
Meaning - MYTHICAL MABON'S DOG
- Name - DRUMMOND
Meaning - LIVES ON THE HILL TOP
- Name - DUANE
Meaning - SONG
- Name - DUBV
Meaning - DARK FACED
- Name - DUER
Meaning - HEROIC
- Name - DUER
Meaning - HERO
- Name - DUFF
Meaning - DARK FACED
- Name - DUFFY
Meaning - DARK FACED
- Name - DUGHALL
Meaning - DARK STRANGER
- Name - DUNCAN
Meaning - DARK SKINNED FIGHTER
- Name - DUNCAN
Meaning - DARK-SKINNED WARRIOR
- Name - DUNHAM
Meaning - DARK SKINNED FIGHTER
- Name - DUNN
Meaning - BROWN
- Name - DWAYNE
Meaning - SONG
- Name - DYFED
Meaning - FROM DYFED
