Variant spellings are included, so there may be some duplication. If you know of something that should be included, please let me know
| Dacey |
| Dacy |
| Dagg Tipperary/Canada |
| Dagge Tipperary/Canada |
| Dailey |
| Dailey Armagh, Meath |
| Dailey |
| Dailey Australia |
| Daily |
| Daily Armagh, Meath |
| Daily |
| Daily Australia |
| Daley |
| Daley Armagh, Meath |
| Daley |
| Daley Australia |
| Dalley |
| Dalley Armagh, Meath |
| Dalley |
| Dalley Australia |
| Daly |
| Daly Armagh, Meath |
| Daly |
| Daly Australia |
| Dargan |
| Dargan |
| Dargan |
| Dargin |
| Dargin |
| Dargin |
| Darkin |
| Darkin |
| Darkin |
| Darmody Australia |
| Dásan (archived) |
| Dauley |
| Dauley Armagh, Meath |
| Dauley |
| Dauley Australia |
| Davett |
| Davett (archived) |
| Davine Ireland and London |
| Davit |
| Davit (archived) |
| Davitt |
| Davitt (archived) |
| Dawley |
| Dawley Armagh, Meath |
| Dawley |
| Dawley Australia |
| Dawly |
| Dawly Armagh, Meath |
| Dawly |
| Dawly Australia |
| Dawson (archived) |
| de Angulo Kerry; Archived |
| De Báille |
| De Baróid |
| De Baróid Ardrahan, Co. Galway |
| De Baróid (archived) |
| De Baróid (archived) |
| De Baróid Belmullet, Co. Mayo |
| de Beic Mullaghbrack, Co. Armagh |
| de Beil |
| De Bhailís Limerick /Franklin Co., NY |
| De Bhaldraithe (archived) |
| de Bhosc |
| de Bhosc Cavan |
| de Bhosc (archived) |
| de Bhosc Ireland, New York (archived) |
| De Bhulbh |
| De Bhulbh |
| De Bhulbh Abbeyfeale, Co. Limerick |
| De Bhulbh Moyvane (Newtownsandes) area?, Co Kerry |
| de Boyville |
| de Boyville Co. Clare |
| de Boyville Co. Tyrone |
| de Boyville |
| de Boyville Belfast, South Carolina |
| De Brún |
| de Búit |
| de Búit (archived) |
| de Búiteach |
| de Búiteach (archived) |
| De Buitléir |
| De Buitléir New Ross, Galway and La Rochelle |
| De Búrca Skibbereen, Co. Cork. |
| De Búrca |
| De Búrca (archived) |
| De Búrca Tipperary |
| De Búrca Glenamaddy, Co. Galway |
| de Burgh |
| de Burgh Skibbereen, Co. Cork. |
| de Burgh |
| de Burgh (archived) |
| de Burgh Tipperary |
| de Burgh Glenamaddy, Co. Galway |
| de Burgh |
| De Burgho |
| De Burgho Skibbereen, Co. Cork. |
| De Burgho |
| De Burgho (archived) |
| De Burgho Tipperary |
| De Burgho Glenamaddy, Co. Galway |
| De Burgho |
| de Carduibh |
| de Carraig |
| de Creag |
| de Glin Moylough, Co. Galway/ Canada |
| de Gordún Kilgarriff, Fairymount (Tibohine), Co. Roscommon |
| De Grae |
| De Grae Kilkenny |
| De Hál |
| De Hál (archived) |
| de Henebre |
| de Hindeberg |
| de Hosae Dingle area, Co. Kerry; and London |
| de Hosae |
| de Husae Dingle area, Co. Kerry; and London |
| de Husae |
| De Lacy |
| De Léis |
| de Línse London (Irish connections) |
| de Liostún |
| de Lochtús |
| de Lochtús Wexford |
| de Lochtús |
| de Lochtús |
| de Moiréis |
| de Móra Co. Down |
| de Móra (archived) |
| de Móra |
| De Nais Cork |
| de Nógla Kerry; Archived |
| de Nógla |
| De Paor |
| De Paor Waterford |
| De Paor (archived) |
| de Priondargás |
| De Róiste |
| De Róiste (archived) |
| De Róiste Macroom, Co. Cork |
| De Róiste |
| de Treó |
| De Vere (archived) |
| Dea |
| Dea |
| Dea |
| Deacey |
| Deacy |
| Deasey |
| Deasy |
| Dee |
| Dee |
| Dee |
| Deecy |
| Deere |
| Deere Kilfeacle, Tipperary/ Australia |
| Deere |
| Degnan |
| Deighnan |
| Deignan |
| Déiseach |
| Delahanty |
| Delahunt |
| Delahunty |
| Delaney Prince Edward Island |
| Delaney 1798 Transportee |
| Delaney Kilkenny/Australia |
| Delanty |
| Delany Prince Edward Island |
| Delany 1798 Transportee |
| Delany Kilkenny/Australia |
| Delehanty |
| Dellahunty |
| Dempsey Laois (Queen's) & Massachussetts |
| Dempsey Wicklow/ Australia |
| Dempster Laois (Queen's) & Massachussetts |
| Dempster Wicklow/ Australia |
| Dempsy Laois (Queen's) & Massachussetts |
| Dempsy Wicklow/ Australia |
| Denaghy Co. Cork, Texas |
| Denahy Co. Cork, Texas |
| Denehy Co. Cork, Texas |
| Denihy Co. Cork, Texas |
| Dennahy Co. Cork, Texas |
| Dennehy Co. Cork, Texas |
| Dennihy Co. Cork, Texas |
| Dermod |
| Dermody Australia |
| Dermot |
| Dermott |
| Desmond Cork city (archived) |
| Devan Ireland and London |
| Devane Ireland and London |
| Dever (archived) |
| Devere (archived) |
| Devers (archived) |
| Devin Ireland and London |
| Devine Ireland and London |
| Devir (archived) |
| Devit |
| Devit (archived) |
| Devitt |
| Devitt (archived) |
| Devon Ireland and London |
| Devor (archived) |
| Devott |
| Devott (archived) |
| Diamond Tuam (archived) |
| Diarmod |
| Diegnan |
| Dignam |
| Dignan |
| Dimond Tuam (archived) |
| Dinegan Donegal, New York |
| Dinigan Donegal, New York |
| Dinnegan Donegal, New York |
| Dinnehy Co. Cork, Texas |
| Dinnigan Donegal, New York |
| Divan Ireland and London |
| Divane Ireland and London |
| Diveen Ireland and London |
| Diver (archived) |
| Divers (archived) |
| Divin Ireland and London |
| Divine Ireland and London |
| Divver (archived) |
| Docherty |
| Docherty |
| Docherty |
| Docherty Derry |
| Dockery (archived) |
| Dockrey (archived) |
| Dockry (archived) |
| Dogherty |
| Dogherty |
| Dogherty |
| Dogherty |
| Dogherty Derry |
| Doghery |
| Doghery |
| Doghery |
| Doghery |
| Doghery Derry |
| Doherty |
| Doherty |
| Doherty |
| Doherty |
| Doherty Derry |
| Dolan Galway |
| Dolan Dunamon, Co, Roscommon |
| Dolin Galway |
| Dolin Dunamon, Co, Roscommon |
| Donagh |
| Donagh Co. Sligo |
| Donaghoe Cavan |
| Donaghoe (archived) |
| Donaghoe |
| Donahoe Cavan |
| Donahoe (archived) |
| Donahoe |
| Donahue Cavan |
| Donahue (archived) |
| Donahue |
| Donalan |
| Donalan (archived) |
| Donalan |
| Donalan Clare & Quebec |
| Donaldson Knocklonogad?, Garryhill, Co. Carlow |
| Donalin |
| Donalin (archived) |
| Donalin |
| Donalin Clare & Quebec |
| Donavan |
| Donavan |
| Dondon |
| Dondún |
| Donelan |
| Donelan (archived) |
| Donelan |
| Donelan Clare & Quebec |
| Donell Donegal, New Zealand |
| Donell |
| Donell (archived) |
| Donell Via Glasgow to Philadelphia (archived) |
| Donell |
| Donellan |
| Donellan (archived) |
| Donellan |
| Donellan Clare & Quebec |
| Donelly Tyrone. Archived |
| Donelly Fermanagh |
| Donelon |
| Donelon (archived) |
| Donelon |
| Donelon Clare & Quebec |
| Donely Tyrone. Archived |
| Donely Fermanagh |
| Dongan (archived) |
| Dongán (archived) |
| Donlan |
| Donlan (archived) |
| Donlan |
| Donlan Clare & Quebec |
| Donley Tyrone. Archived |
| Donley Fermanagh |
| Donlon |
| Donlon (archived) |
| Donlon |
| Donlon Clare & Quebec |
| Donneellan |
| Donneellan (archived) |
| Donneellan |
| Donneellan Clare & Quebec |
| Donnelan |
| Donnelan (archived) |
| Donnelan |
| Donnelan Clare & Quebec |
| Donnell Donegal, New Zealand |
| Donnell |
| Donnell (archived) |
| Donnell Via Glasgow to Philadelphia (archived) |
| Donnell |
| Donnellan |
| Donnellan (archived) |
| Donnellan |
| Donnellan Clare & Quebec |
| Donnellon |
| Donnellon (archived) |
| Donnellon |
| Donnellon Clare & Quebec |
| Donnelly Tyrone. Archived |
| Donnelly Fermanagh |
| Donnelson Knocklonogad?, Garryhill, Co. Carlow |
| Donnely Tyrone. Archived |
| Donnely Fermanagh |
| Donnollan |
| Donnollan (archived) |
| Donnollan |
| Donnollan Clare & Quebec |
| Donnolly Tyrone. Archived |
| Donnolly Fermanagh |
| Donnolon |
| Donnolon (archived) |
| Donnolon |
| Donnolon Clare & Quebec |
| Donoghoe Cavan |
| Donoghoe (archived) |
| Donoghoe |
| Donoghue Cavan |
| Donoghue (archived) |
| Donoghue |
| Donohoe Cavan |
| Donohoe (archived) |
| Donohoe |
| Donohoue Cavan |
| Donohoue (archived) |
| Donohoue |
| Donohue Cavan |
| Donohue (archived) |
| Donohue |
| Donohugh Cavan |
| Donohugh (archived) |
| Donohugh |
| Donolan |
| Donolan (archived) |
| Donolan |
| Donolan Clare & Quebec |
| Donoughoe Cavan |
| Donoughoe (archived) |
| Donoughoe |
| Donovan |
| Donovan |
| Doody Galbally/ Knocklong, Co. Limerick |
| Doogan |
| Doogane |
| Dooghan |
| Doolan |
| Dooley (archived) |
| Doolin |
| Dooling |
| Dooly (archived) |
| Dorain |
| Doran |
| Dorgan |
| Dorgan |
| Dorgan |
| Dorian |
| Dorin |
| Dorohy |
| Dorohy (archived) |
| Dorohy (archived) |
| Dorohy |
| Dorohy |
| Dorohy Macroom area, Co. Cork; and Glynn, Mourneabbey, Co. Cork |
| Dorohy |
| Dorrian |
| Doude Galbally/ Knocklong, Co. Limerick |
| Dougan |
| Doughan |
| Dougharty |
| Dougharty |
| Dougharty |
| Dougharty |
| Dougharty Derry |
| Dougherty |
| Dougherty |
| Dougherty |
| Dougherty |
| Dougherty Derry |
| Doulan |
| Dounes Clare/ Australia |
| Dowall |
| Dowall Tyrone (archived) |
| Dowall (archived) |
| Dowall |
| Dowda Galbally/ Knocklong, Co. Limerick |
| Dowell |
| Dowell Tyrone (archived) |
| Dowell (archived) |
| Dowell |
| Dowley (archived) |
| Dowlin |
| Dowling |
| Downes Clare/ Australia |
| Downs Clare/ Australia |
| Doyle Waterford |
| Doyle |
| Doyle |
| Doyne Mayo & Lancashire |
| Doyne Dunn Sept Association |
| Doyne |
| Doyne |
| Doyne |
| Driscol Cork |
| Driscol (archived) |
| Driscol (archived) |
| Driscoll Cork |
| Driscoll (archived) |
| Driscoll (archived) |
| Duddy Galbally/ Knocklong, Co. Limerick |
| Dudly Galway |
| Dudly Dunamon, Co, Roscommon |
| Dugan |
| Duggan |
| Duggen |
| Duggin |
| Duigenan |
| Duignam |
| Duignan |
| Dulhunty |
| Dullanty |
| Dullenty |
| Dun Mayo & Lancashire |
| Dun Dunn Sept Association |
| Dun |
| Dun |
| Dun |
| Dunavan |
| Dunavan |
| Dunden |
| Dundon |
| Dundun |
| Dungan (archived) |
| Dunlap |
| Dunlop |
| Dunn Mayo & Lancashire |
| Dunn Dunn Sept Association |
| Dunn |
| Dunn |
| Dunn |
| Dunna Mayo & Lancashire |
| Dunna Dunn Sept Association |
| Dunna |
| Dunna |
| Dunna |
| Dunne Mayo & Lancashire |
| Dunne Dunn Sept Association |
| Dunne |
| Dunne |
| Dunne |
| Dwyer |
| Dwyer Kilfeacle, Tipperary/ Australia |
| Dwyer |
| Dwyre |
| Dwyre Kilfeacle, Tipperary/ Australia |
| Dwyre |
| Dyar (archived) |
| Dyer (archived) |
| Dymond Tuam (archived) |