Dancey. English origins. Used as a variant for Dauntsey, which see. They have been in Co. Cavan in Southern Ulster since the 18th Century AD.

O Dane - Irish / Ua Deaghain - deaghan / dean. A Sept / Family branch, who had their territory in Co. Roscommon in the east of the Connacht Province. See also Deane.

Mac Daniell. Used as a synonym for Mac Donnell, which see.

Mac Daniell. Gaelicized. Welsh origins. They were in in Co. Kerry in the south - west of Desmond / Southern Munster in the 13th Century AD.

Mac Darby - Irish / Mheic Diarmaid. A Sept / Family branch, who had their territory in Co. Tipperary in the north - east of Ormond / Aur Mhumhain / Eastern Munster and nearby in Southern Leinster.  Some also changed to Mac Dermott, which see. See also - Darmody.

Darby. English origins. They were in Co. Laois in the mid - north - west of Southern Leinster in the 16th Century AD.

Darcey -

O Darcy or O Dorcy or O Dorcey - Irish / Ua Dorchaidhe - dorcha / dark. A Sept / Family branch, who had their territory in Co. Mayo and Co. Galway in the west of the Connacht Province. One of the "Tribes of Galway." See also - Mac Gourkery.

O Darcy - Irish / Ua Dorchaidhe - dorcha / dark. A Sept / Family branch, who had their territory in Co. Wexford in the south - east of Southern Leinster.

Mac Darcy - Irish / Mheic Dorchaidhe. An Irian Conmaicne Magh Rein Cenel Luachain Sept / Family branch,  who had their territory at  Oughteragh / Carrigallen in the south of Co. Leitrim in Northern Connacht. Especially see - Mac Dorcy. Anglicized to Darcy in Co. Fermanagh in the south - west of the Ulster Province.

Darcy / de Arci / de Arcy. Anglo Norman origins. They were in Co. Meath in the south - east of Northern Leinster.

Darcye -

Dardis / de Ardis / de Artrois. Norman origins. They were in Co. Meath in the south - east of Northern Leinster.

O Dargan - Irish / Ua Deargain - dearg / red. A Sept / Family branch, who had their territory in the Leinster Province.

O Dargan or O Dorgan - Irish / Ua Deargain - dearg / red. A Sept / Family branch, who had their territory in Co. Cork in Desmond / Des Mhumhain / Southern Munster where they are known as O Dorgan and where is Ballydorgan.

Darley. English toponymic origins. They have been in Co. Dublin in the north - east of Southern Leinster since the 17th Century AD.

Darling. They have been in Co. Dublin in the north - east of Southern Leinster since the mid - 17th Century AD, and are now also in Co. Antrim in the north - east of the Ulster Province.

O Darmody or O Dermody - Irish / Ua Diarmada. A Sept / Family branch, who had their territory in Co. Tipperary in the north - east of Ormond / Aur Mhumhain / North Eastern Munster and nearby in Southern Leinster. Sometimes changed to Mac Dermott, which see. See also - Dermond.

O Darra. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Siol Daim Argait (Ui Cremthainn) Clann Lugainn Sept / Family branch, of the Maguires, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. Especially see - O Darragh.

 O Darragh or O Darra or O Darrough or Oaks / Ui Dubhdhara dair / oak, A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Siol Daim Argait (Ui Cremthainn) Clann Lugainn Sept / Family branch, of the Maguires, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. Kinsmen also to Mac Alear / Mac Eleer / Mheic Gilla Uidhir, Mac Aleese / Mac Gileece / Mac Leece / Mac Illeese / Mac Leese / Mac Lice / Mac Lise etc / Mheic Giolla Iosa, Mac Anally / Mac Cowley / Mac Culloo / Mheic Con Uladh, Mac Auley / Mac Awley / Mac Gawley / Mheic Amhlaoibh. Mac Breen / Mheic Braoin, Mac Caffrey / Mac Godfrey / Mheic Gafraidh, Mac Cassidy / Mheic Asidha, Mac Cormack / Mheic Cormaic, Mac Court or Mac Courtney / Mheic Cuarta / Mheic Cuairt. Mac Corry / Mac Curry / Mac Corrie / Mac Gorry / Mac Godfrey  Mac Gohery / Mac Goffrey / Mheic Gothraidh, Mac Gee / Magee / Mheic Aodh, O Heany / O Heeny / O Hegney / O Higny / Bird / Ui hEgneach, Mac Lilly / Mac Calilly / Mac Lely / Mac Lillie / Mac Alilly / Mac Alyly / Mheic Ailghile, Mac Loughlin / Mac Lachlan / Mheic Lochlainn, Mac Manus / Mheic Maghnuis, Mac Morrow / Mac Murrow / Mheic Murchada (Clann Aodh). Ancestors - *98.Lugan, *97.Irgalach, *96.Eignigh, *95.Cormac, *94.Fergus, *93.Aed, *92.Cormac, *91.Cairpre "Daim Argait," *90.Eochy / Echach, *89.Criffan / Crimthann "Leith" / "Lethan,- *88.Feicc, *87.Dega "Duirn," *86.Rochatha / Rochadh, *85.Murray / Muiredach "Colla da Crioch" / "Focrith" - of the Two Countries, *84.Eochy / Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

Mac Darragh - Irish / Mheic Dubhdara - dair / oak. They were in Co. Antrim in the north - east of the Ulster Province. Darren was also used as a variant.

Mac Darrock. A Heremonian Ui Laoghaire Ui Lughaidh Cu Corb Sept / Family branch. Ancestors - *86.Cu "Corb," *60.Leary / Laoghaire the 68th King of Tara / Erinn, *59.Ugaine the Great the 66th King of Tara / Erinn.

Mac Darroch. Highland Scottish origins. A Sept / Family branch, of the Mac Donalds. Ancestors - *85.Carroll / Carioll "Colla Uais" the 121st King of Tara / Ireland, *84.Echu "Doimhlen," *83.Cairbre "Liffeachair" the 116th King of Tara / Ireland.

O Darrough. A Heremonian Ui Cobhthaigh Dal Cuinn Colla da Crioch Siol Daim Argait (Ui Cremthainn) Clann Lugainn Sept / Family branch, of the Maguires, who had their territory in Co. Fermanagh in the south - west of the Ulster Province. Especially see - O Darragh.

Daton or Daughton / de Auton - Norman origins. They were in Co. Kildare in Central Southern Leinster in the 13th Century AD. Now mainly known as Dalton.

Davane. Used as a variant for O Devane, which see - Irish / Ua Dubhain. A Sept / Family branch, who had their territory in the Connacht Province. Davin used as a variant.

O Davane - Irish / Ua Damhain. A Sept / Family branch, who had their territory in the Ulster Province. Used as a variation also there for O Devine, which see.

Davenport. English toponymic origins. They were in Co. Dublin in the north - east of Southern Leinster in 1477 AD. Some also came later into Ireland during the Oliver Cromwell Invasion.

Davenport - Irish. See - Donarty in the Munster Province.

Mac Davett. See - Mac Davitt.

                                                                                              +On to Davey - Day