O Diamond - O Dineen
O Diamond or O Dimon or O Dimond -
Irish / Ua Diamain. An Erenagh Sept / Family branch, who had their territory in the east of Co. Derry in the north - east of the Ulster Province and are now also in Co. Donegal in the north west of Ulster and nearby in Northern Connacht. Definition of an Erenagh: By the 11th Century the Abbot in the churches was known as the Comharba / Co - Arb who was the heir of the Saintly founder / or, if this church was not the Saint’s main institution, the Airchinnech / Erenagh / head, who had become the lay Lord. His Family then held the office and the church property from generation to generation. Generally the Comharba or Airchinnech maintained a priest.
Diarmod. See Dermond.
Dick / Richard. Scottish origins in
Ireland in the 17th Century AD into Co. Antrim and Co. Down in the east of the Ulster Province after the confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh Dal Cuinn "northern" Ui Niaill territories and the foreign non - Catholic plantations there. Dix was also used as a synonym.
Dickeson -
Dickey -
Dickson or Dixon. English origins. See also Deehan and Deighan.
O Diffin. Used as a variant for O Duffin, which see, in Co. Armagh and Co. Tyrone in the south of the Ulster Province.
O Diffley or O Duffley. Used as variants for O Devilly, which see.
O Difney. Used as a variant for O Diviney, which see.
O Digan. Used as a variant for O Deegan, which see.
Mac Digany or Mac Digney -
Irish / Mac an Deaganaigh. See Mac Deane.
Digby. English origins in 1689 AD they were granted the territory and the Castle of the Irish Heremonian Ui Laoghaire Ui Lughaidh Cu Corb O Dempsey Chiefs, by the English authorities.
O Diggin - Irish / Ua Duibhginn - dubh (black) ceann (head). A Sept / Family branch, who had their territory in Co. Kerry in the south - west of Desmond / Des Mhumhain / Southern Munster. Usually pronounced O Duigan and O Deegan elsewhere.
O Dignam or O Dignan. See O Duigenan.
O Dilgan - Irish / Ua Duibhleachain. A Sept / Family branch, who had their territory in Co. Clare in the north - west of Tuaiscert Mhumhain / Thomond / Northern Munster. Cognate with O Dullahan.
Dill. English origins in Co. Donegal in the north - west of the Ulster Province in the early 17th Century AD after the confiscation of the 3,500,000 acres of the Heremonian Ui Cobhthaigh Dal Cuinn "northern" Ui Niaill territories and the foreign non - Catholic plantations there.
O Dillahan. Used as a variant for O Dullahan, which see.
O Dillane - Irish / Ua Duilleain. A Sept / Family branch, who had their territory in Co. Limerick in the mid - north - west of Thomond / Tuaiscert Mhumhain / Northern Munster and in the north of Co. Kerry in the south - west of Des Mhumhain / Desmond / Southern Munster. Some changed to O Dillon, which see and was also used as a variant for O Delane, which see.
O Dilleen - Irish / Ua Duillin. Used as a variant for O Dillane, which see, in Co. Clare in the north - west of Thomond / Northern Munster and nearby in the south of Co. Galway in Southern Connacht.
Dillon. Heremonian Dal Cuinn "southern" Ui Niaill Sept / Family initial branch who had their original territory in Co. Meath in Northern Leinster where Sir Charles Dillon had his Estates and they then went to France in the 7th Century AD where they became the Dukes of Aquitaine whose descendant then returned to Ireland with Prince John and received large grants of land in Co. Westmeath in the south - west of Northern Leinster where they were appointed English Barons and were also the English appointed Earls of Drumrany, and the Barons of Kilkenny West in Co. Meath. Their branches in Connacht Province became the English appointed Earls of Roscommon and Viscount Dillon in Co. Mayo, English Barons of Clonbrock and several were Counts and Generals in the service of France and Austria. In Co. Galway in Southern Connacht at Loch Glinn is their original Family residence, which is now used as a Franciscan Convent for the Missionaries of Mary.
Dillon / Diolun. Hibernized as Ua Duilleain and were of Norman Breton origins. (Descended from Sir Henry de Leon) who arrived into Ireland in 1185 AD. They took over control of Co. Longford and Co. Westmeath in the west of Northern Leinster where it was later known as Dillon’s Country and were 3 separate branches of English Earls who were in Co. Roscommon and Co. Mayo in the Connacht Province, and Co. Meath in the south - east of Northern Leinster and Co. Longford in the north - west of Northern Leinster. Also see Dillane.
O Dignam or O Dignan. See Duigenan.
Dilworth or Dilloghery. See Deloughery.
Dimond. See Diamond.
O Dinahan. A Sept / Family branch, who had their territory in Co. Limerick in the mid - north - west of Tuaiscert Mhumhain / Thomond / Northern Munster where they were Chiefs. See also O Deenihan.
O Dinan or O Dynan - Irish / Ua Daghnain. A Sept / Family branch, who had their territory in Co. Tipperary in the north - east of Aur Mhumhan / Ormond / North Eastern Munster. They were the Chiefs of Uaithne whose territory was in the Barony of Owney Beg in Co. Limerick in the mid - north - west of Tuaiscert Mhumhan / Thomond / Northern Munster and are now in Co. Clare and Co. Cork in the Munster Province. Some of the O Dynans in Co. Cork also changed to O Dinneen.
O Dinane - A Sept / Family branch, who had their territory in Co. Cork in Des Mhumhain / Desmond / Southern Munster.
O Dineen or O Dinneen or O Dinan
- Irish / Ua Duinnin. Gaelic Ithian Corca Laoidhe Sept / Family branch, who had their territory in Co. Cork in Des Mhumhain / Desmond / Southern Munster. Ancestors: 36.Lewy / Lughaidh, 35.Ith (Ithians).