The Tribe of Cas

HISTORY

The Baronies of Munster

County Clare [11 baronies]

All - Anciently inhabited by the Ganagani according to Ptolemy, and cited to be descended from the Concani Celts of Spain. Very early the county formed part of Tuath Mumhan or Thomond and was divided into six contreds: Hy Lochlean or Bhurrin, Corcu Mruadh, Ibh Caisin, Hy Garman, Clan Cuilean and Dal gCais. The O'Briain (O'Brien) were kings of Thomond, or North Munster, and later Earls of Thomond for many centuries. The MacNamara's were lords of Clancullen, a greater part of east Clare, from the late 11th century
Bunratty (Lower) - This area was earlier part of the cantred of Dal Gaes, also named Tradaree. O'Aherne and O'Kearney are given as chiefs of Ui Cearnaidh (Cearnaigh) and "Six Mile Bridge" marks their territory, which also included part of Tulla, up to the 14th century. The Dalcassian O'Kearneys migrated to Cashel.
Bunratty (Upper) - An area which was very early a part of the cantred of Dal Gaes, also named Ó gCaisin. O'Neill, chief of Finnluarach, aka Clan Delbuidhe (Dalvy) is noted here. The sept of MacNamara Fyne were noted as chiefs of West Clancullen in the barony of Bunratty.
Burren - In early days the area ir was also known as Hy Lochlean, or Bhurrin, where the O'Loghlins or O'Laghlins were chiefs. It was also part of Corca Modhruadh, a territory co-extensive with the Diocese of Kilfenora. The chief families of this clan were the O'Loughlins, the O'Connors and at one time possibly the O Garbh (O'Garvan).
Clonderalaw - originally the eastern part of Corca Baiscinn, it was also referred to as Clan Cuilean where the McNamaras presided. Mac Mathghamha (MacMahon) were later chiefs and lords of Corca Baiskind here and in the barony of Moyarta. The O'Boland clan is also cited here, as well as Kilroy, chief of Clonderlaw.
Corcomroe - Mac Fhlannchaidh (MacClancy) held their seat of power here at Cahirmacclanchy. The O'Connors and O'Loughlins of Clare hail from this area (see Burren barony) as chiefs of Corcu Mhuadh, a territory which included this barony. O'Connor is also cited as chief of the territory of Fear Arda. O'Davoren was cited as a chief brehon, and chief of Muintir Lidheagha, seated at Lisdoonvarna.
Ibrickan - Early known as Hy-Bracain with O'Mulcorcra(?) as chief. Also referred to as Ibh Caisin and held by the Cumhead-mor O'Briens, ancestors of the O'Briens. MacConsaidin (MacConsidine) are noted here. MacBrody were hereditary historians in Thomond. An O'Gorman (MacGorman) sept were noted as chiefs of Tullichrin, a territory comprising parts of the baronies of Moyarta and Ibrackan, where they settled [from Co. Leix] following the Norman invasion. An O'Mulvey (O'Mulmea) sept, chief of Brentry, is noted here near Slievecallan.
Inchiquin - Also know as the triocha Cét of Cineal Fearmaic. Noted here included the Cineal Cuallachta, a branch of the Dal gCais, descended from Aonghus Ceannathrach, son of Cas. O'gRiobta (Griffin) was the chief family of this tribe. The O'Quinns were centered around Corofin, their territory known as Muintear Ifearnain. The O'Deaghaidh (O'Dea) sept were noted as chiefs of Dysart-O'Dea, a considerable territory in the barony of Inchiquin. An O'Neill sept, of the Ui Bloid, was noted near here as chiefs of Clan Dalvy and of Tradree.
Islands - The triocha Cét of the Uí Cormaic comprised a large section of this barony. O hAichir (O'Hehir) were chiefs of Ui Cormaic and Ui Flanchadha in the old territory of Thomond. It was also known by the name Clonroad. O'Clohessy is later cited here centered at Ballycloghessy.
Moyarta - originally the western portion of the chiefs of the triocha Cét named Corca Baiskind. Also known as Hy Garman, of the O'Brien Arta. A MacDonnell sept is also cited as chiefs of the territories of Corca Baisgin or Baiscind. They descend from Domhnall, son of King Murtagh Mor O'Brien. A MacMahon sept succeeded as later chiefs here.
Tulla (Lower) - Tulla lower and upper were part of the cantred of Dal Gaes, a large portion of this named Ó mBloid. It's original name as a barony is given as Tullaghynaspull. O'Kennedy was found early here at Killaloe before being driven out by the O'Briens and McNamaras. The Thomond O'Hallorans served as chiefs of Faith-ui-Hallurain between the baronies of Tulla and Clare (in Galway) near Lough Derg. O'Grada or O'Grady were cited as chief of Cinel Donghuile (Dongali) here, and were found in the 14th century at Tomgraney parish in Tulla (Upper). O'Maloney is cited as chiefs of Cuiltenan (Kiltananlea parish). The Ui Bloid family of O'Muldoon (Malone) is cited in the parish of Ogonelloe.
Tulla (Upper) - Ui Ronghaile, descendants of Ronghal, a branch of the Dal gCais of which the O'Shanahans were chiefs (near Feakle). Their power was dissolved in the 14th century by the McNamaras. The Mac Namaras are cited as chiefs of Tricha Ced Ui Caisin and of Clan Cuilean, the former located in the Tulla baronies and a part of Bunratty. The sept of MacNamara Reagh were noted as chiefs of East Clancullen in the baronies of Upper and Lower Tulla. O'Duibhgin (O'Dugan O'Deegan) were chiefs of Muintir Conlochta, a district in the parish of Tomgraney, in the barony of Upper Tullagh.
Misc - Ui Bloid, descendants of Blod, son of Cas, a branch of the Dal gCais. This clan includes the O'Kennedy, O'Shanahan, O'Durack and O'Ahern families of eastern Co. Clare. O'Cahill is given as one of the chiefs of Finn-coradh (Fianchora), along with O'Flattery in Thomond. O'Dobharchon (O'Davoren) is cited as chief of Muintir Lidheaga (O'Liddys). Lysaght is placed in a district about Ennistymon; O'Daly of Leath Mogha or Munster, in the barony of Burren; MacGillereagh (MacGilroy, MacGilrea, Gilroy, Kilroy) in the barony of Clonderlaw; and MacBruodin, in the barony of Inchiquin.

County Cork [21 baronies]
All - Anciently inhabited by the Uterni or Iberni as cited by Ptolemy, as well as the Vodiae and the Coriondi. The county was included in the territory of Desmond, or south Munster, which included Co. Kerry and the west of Co. Waterford. Divisions within Cork at the coming of the Cambro-Normans Cork included Ivelaugh, Bear, Dubh Alla, Insovenagh, Muskerry and Fearmuigh. The (Cambro-Norman) Fitzgeralds later became Earls of Desmond, although the (Irish) MacCarthy Reagh retained their influence for many centuries.
Bantry - Named for an ancient tribe known as the Bentraighe, the Ó Súileabháin (O'Sullivan) Beare were later chiefs here beginning in the 13th century.
Barretts - Cited as part of Múscraighe Mittaine when granted to Richard de Cogan in 1207. Barratt of "Barretts Country" after the coming of the Normans.
Barrymore - named for the de Barri (Barry) family arriving in the wake of the Invasion. O'Liathin (O'Lehan or Lyons) were chiefs of Ui Anmcadha, and lords of Ui Liathain. The O'Riordans of Muskerry are noted here in the place name Ballyreardon. The O'Broders and O'Hegartys are cited in this barony.
Bear - Part of the diocese of Ross, an area which was approximately co-extensive with the ancient territory of Corca Laoidhe. The O'Sullivan Beare were chiefs here beginning in the 13th century.
East Carbery (East) - Carbery is said to derive its name from its ancient chieftain, Carbry Riada. Mac Carthaigh (MacCarthy Reagh) were chiefs here, sometimes styled prince of Carbery.
East Carbery (West) - Sections here were included in the ancient territory of Corca Laoidhe. Mac Carthaigh (MacCarthy Reagh) were chiefs here. O hUorthile (O'Hurley) is cited at Ballynacarriga Castle, as well as being chiefs in neighboring Muskerry barony.
West Carbery (East) - The O'Driscol were head chiefs of the Corca Laoidhe and seated near Baltimore, originally from Co. Kerry and forced south by the O'Sullivans. The O'Flynn of the Corca Laoidhe were seated here. O'Hegarty was found in Carbery West.
West Carbery (West) - O Mathghamhna (O'Mahoney), chief of Ui Eachach, which later became Ivaugh comprising the whole peninsula in West Carbery. Mac Carthaigh (MacCarthy Reagh).
Condons & Clangibbon - was named partly for the Anglo-Norman Condon family. An area known as Clangibbon was held here by the FitzGibbon family, the heads of this family titled "The White Knight" of Desmond. The Irish O Mochair (Moher) sept was noted here.
Cork - Anciently named Corcach or Corcach-Bascoin, signifying 'a marshy place'. Vikings made settlement here in the 9th and 10th centuries to found the city of Cork, although St. Finbarr is attributed founding a cathedral church here much earlier. In the 12th century the city and adjacent country were in possesion of the Danes, who held them under Mac Carthaigh, prince of Desmond.
Courceys - named for the (Anglo-Norman) de Courcy family who arrived in the late 12th century.
Duhallow - O Donnagain's (Donegan's) country was in the baronies of Orrery and Duhallow before the arrival of the Barry (Cambro-Norman) family. They were a once powerful sept of Muscraige Tri Maighe. The territory of the MacAuliffe sept, Glen Omra, was here. O'Nunan is cited as a chief of Tullaleis and Castlelissen in the parish of Tullylease. The O'Callaghan's were lords of Clonmeen near the river Blackwater.
Fermoy - This area was held by the O'Keefes, princes of Fermoy and anciently chief of Glanworth (and Glen Avon), before they moved west near Duhallow. The O'Duggans are anciently cited as chiefs of Fermoy. After the Norman invasion it was held by the Roche family, Viscounts and barons of Fermony, and it became known as Roches country.
Ibane & Barryroe - O'Flynns were chiefs of Ui Baghamna, which covered the baronies of Ibane and Barryroe. The O'Cobhthaigh (O'Cowhy or O'Coffey) had 7 castles on the coast and were lords of Triocha Meona. The O'Cuileannain (O'Cullenane) of Barryroe are cited here. O'Fehilly (aka Field) of Tuatha O Fitcheallaigh is cited as chief in west Barryroe and the parish of Ardfield. Sections of this barony were included in the ancient territory of Corca Laoidhe. Barryroe is named for the Barry Roe sept of the Anglo-Norman Barry family.
Imokilly - anciently part of Muskerry Ilane. O'Breghaim (O'Bregan) were chiefs here, as was (O'Glaisin) O'Gleeson cited as the chief of Ui Mac Caille, from which the barony derives its name. McTire is mentioned among them. O'Ciarin (O'Kieran) is given along with O'Brien and O'Halloran as a chief in this barony. The Mac Oitir (MacCotter) and O'Rinn (Ring) septs are also noted here.
Kerrycurrihy - anciently part of Muskerry Ilane. O'Curry of Clan Torna are found as chiefs here.
Kinalea - Kinalea is named for the clan territory of the Cineal Aodha. O'Ceallachain (O'Callaghan) of the Eóghanacht Chaisil were driven to the north near Mallow by de Barri (Barry) in the wake of the Invasion, and transplanted to Clare in the time of Cromwell. The O'Cahill sept were chiefs of Kinelea in southern County Galway.
Kinalmeaky - O Mathghamhna (O'Mahoney), chief of Ui Eachach Mumhan is cited very early here.
Kinnatalloon - bordering on the Co. Waterford baronies of Coshmore & Coshbride. In the mid 18th century popular surnames here were Keeffe, Ahern, Carthy, Cotter, Daly, Fitzgerald, Geiry, Lyne, Quirk and Walsh.
Kinsale - O'Kearney is cited here as chief of Ui Floinn. By the 13th century the De Courcy dynasty held this territory.
Muskerry (East) - Cited as part of Múscraighe Mittaine when granted to Richard de Cogan in 1207. The Murphy clan of the Muscraighe are associated with the barony of Muskerry. Also, Mac Carthaigh (MacCarthy) of Blarney Castle. The O'Flynns were Lords of Muskerrylinn here.
Muskerry (West) - Cited as part of Múscraighe Mittaine when granted to Richard de Cogan in 1207. O Laoghaire (O'Leary) were chiefs in Corca Laidhe in south-west Cork, prior to the Norman Invasion. Also noted here is Mac Carthaigh (MacCarthy) of Blarney Castle.
Orrery and Kilmore - O'Cuileannain (O'Cullenane) was sited as chiefs alongside the (O)Donegans who were cited as chiefs of Muskery of the Three Plains (Muscraige Tri Maighe). Later came the de Barri (Barry) family in the wake of the Norman Invasion.
Misc - From long established tribal groupings in County Cork, such as the Corca Laidhe, the Muscraighe and the Eoghanachts of the Cork region, emerged such family names as O'Driscoll, O'Leary, Cronin; Murphy; O'Mahony and O'Keeffe, respectively. O'Healy is cited as chiefs of Pobble Healy, a parish in the barony of Muskerry. O'Doorie is sited as chiefs of Ui Congalei (Tuath Congali), possibly in Co. Clare(?). O'Hea is cited as chief of Pobble O'Hea in the barony of Carbery.

County Kerry [9 baronies]
All - Ptolemy cites the Velabri or Vellibori, and the Luceni as ancient inhabitants of this area. At the coming of the Normans, the O'Connor Kerry held the north, the O'Moriaritys held the middle parts, and the southern portion was occupied by the O'Sullivans, O'Donoghues and O'Mahonies. By the end of the 13th century the county was subject to the power of the Fitzgerald lords of Desmond, the Fitz-Mauirce lords of north Kerry, and the Irish McCarties, tanists of the elevated central and southern regions. By the mid 14th century the Fitzgeralds were Earls of Desmond over the liberties of Kerry.
Clanmaurice - Formerly called Altry, it was named for Maurice FitzThomas FitzGerald, an early Cambro-Norman. From Maurice came the Fitzmaurice family of the area known as Lixnaw, later known as earls of Kerry. Stack's country is given here between Tralee and Abbeyfeale.
Corkaguiny - Dingle Peninsula was the homeland of the Corcu Duibhne from the 6th century. The O'Falvey sept were chiefs here from the 12th to the 17th century. O'Shea and O'Connell are also mentioned alongside the O'Falveys. The Bowler family was also cited in this barony. Corcaguiney with Dingle became the land of Fitzgerald, the Knights of Kerry, in the 13th century.
Dunkerron (North) - The O Sullivan Mor were lords in this area at the coming of the Normans in the early 13th century. Their descendants, the MacGillycuddys (of the Reeks) are also cited here.
Dunkerron (South) - O'Sullivan's country. The O Sullivan Mor were lords in this area from the 13th century, holding these lands prior to the coming of the Normans. O'Moriarity is cited here in the parish of Templenoe as chiefs of Aes Asdi.
Glanarought - O'gRiobta (Griffin) were chiefs centered at Ballygriffin. The McCarties were centered here in the mid 13th century.
Iraghticonnor - O'Connor of Kerry held sizable estates in north Kerry, their territory named Hy Cain air Ciaruidhe.
Iveragh - O Seaghdah (O'Shea), chiefs of Iveragh. Falvey and O'Connell were chiefs in this area also, branching out from the Corcu Duibhne in the 10th century.
Magunihy - O'Conghail (O'Connell) ruled as chiefs here. By the 11th century the O'Donaghues forced them towards the west coast, as the O'Donaghues were driven from Cork by the MacCarthys and O'Mahanoys. The Mac Carthaigh (MacCarthy Mor) were centered at Muckross, near Killarney, south of the O'Donaghue territory. The ancient clan names of the O'Donaghue clan were Cinel Laoghaire and Clan tSealbach. The Mac Gillycuddys are also noted here.
Trughanacmy - Formerly caled Aicme Ciarraighe, the O Muircheartaigh (O'Moriarity), chief of Eoghanacht Locha Lein, is cited here and in the barony of Magunihy up to the time of the Norman invasion (c. 1200). O'Laeghain (O'Leyne or Lane) is given as chief of Ui Ferba (Offerba, a district along the coast northward from Tralee). The MacElligott family is cited here for the parish name of Ballymacelligott.
Misc -

County Limerick [14 baronies]
All - Anciently inhabited by perhaps the Coriondi tribe, as translated from Ptolemy of the 2nd century. Later tribal names here include the Uaithne, the Ciarrage [Luachra] and the Ui Fidgeinte. With the ascendancy of the Eoganacht in the 7th century, part of the county came to be referred to as Eoghanacht Aine Cliach (Airthir Chliach), which was sub-divided into five cantreds: Carrigoginniol, Uaithne, Cairbre Aobhdha, Ui Conaill Gabhra, and Connalla. In addition to the septs who controlled these cantreds, the other principal families at the time of the Norman Invasion were O'Hurley, Mac Sheehy, O'Gorman, O'Collins, O'Coin, O'Scanlan, and O'Hallinan. At that time part of the county had been included within the O'Brien province of Thomond.
Clanwilliam - named for the Clanwilliam Burkes. The O'Cuircs (O'Quirkes) were noted here in the 11th and 12th centuries as kings of Muscraige Cuirc, sometimes called O'Quirkes Country. The O'Heffernans are cited here after being displaced by the Ryans from Owney and Owneybeg baronies. Also see County Tipperary. The Ó Conaings (O'Gunning), a sept of the Ui Bloid, were noted with territory near Castlegunning (Castleconnell) prior to being dispossessed by the MacWilliam Burkes in the 13th century.
Connello (Lower) - Anciently the Ui Fidhgeninte occupied Connello, e.g. O'Flannery. Connalla was the name of the Eoghanacht cantred here, run by the O'Kinealys and O'Thyans. O'Coileain (Collins or Cullane) were lords of Connello until they settled in Cork in the 13th century. The chief of the O'Sheehans is found anciently here. O'Morny is cited in the barony of Lower Conello.
Connello (Upper) - Hy Cnocnuil Gabhra (aka Ui Conaill Uachtarach) was the name of the Eoghanacht cantred here, run by the McEneirys and O'Sheehans. MacEneiry (MacHenry) is further cited as chief of the Corca Muikedha (Muiceadha). O'Coileain (Collins or Cullane) were later lords of Connello until they settled in Cork in the 13th century. The O'Billrys were also cited as a chief in Ui Conaill Gabhra (Guara). O'Meehan is cited as chiefs in Connello, along with O'Cullane and O'Sheehan. O'Connell is cited as chief of Hy-Cuilean, a territory south-east of Abbeyfeale, before they settled across the border in Kerry in the 12th century.
Coonagh - Mac Ui Bhrian (Mac Brien). Mac Longachain (Long or Longan) is found alongside the O'Dwyers as chiefs of a territory which included part of this barony and part of Owney and Arra in Tipperary.
Coshlea - O'hAodha (O'Hea or Hayes) is given as chief of Muscraidhe Luachra, between Kilmallock and Ardpatrick.
Coshma - Hy Cnocnuil Gabhra was the name of the Eoghanacht cantred here. O'Kinealy (O'Kenealy) is given as an ancient chief in a territory (Eoganacht Grian Guara) which included Coshma and the barony of Small County. In the 11th century Ó Cleirchín, or O'Clerkin (Clerk, Cleary,), was recorded in this area as a "Lord of the Ui Fidhgeinte" and as lord of Ui-Cairbre.
Glenquin - O hAilgheanain (O'Hallinan) is cited with a six-story Tower House here before being wiped out by the O'Briens.
Kenry - O'Flannery and O'Clerkin are cited here as chief of Dal Cairbri. Cairbre Aobhdha (Dal Cairbre Eva) was the name of the Eoganacht cantred here, also ruled by the O'Donovans. The Irish family of O'Beargha (Barry) were chiefs here. O'Mulcallen (O Maolchallan) is cited as chief of Conriada in this barony.
Kilmallock - Cill Mocheallóg, in Irish, containing the single parish of St. Peter's and St. Paul's. The Desmond Geraldines (FitzGerald) were noted philanthropists here.
Limerick City - founded by the Vikings in the 9th and 10th centuries.
Owneybeg - Uaithney was the name of the Eoghanacht cantred here, controlled by the O'Maoilriain (O'Mulryan or O'Ryan) and were cited as chiefs of 'Owney Mulryan' which included both Owneybeg, and Owney in Co. Tipperary. Mac Eochaid (MacKeogh) were cited as chief of Uaithni Tire, or Owney, which also included the barony of Owney and Arra in Co. Tipperary. O'Dinan (Dinnahane) is cited as chiefs of Uaithne here, as hereditary chiefs of the Eoghanacht Uaithne Agamar. Ó Cathaláin (O'Culhane) is cited as a chief of Owney Beg before being dispossessed by the O'Mulryans in the late 12th/early 3th centuries.
Pubblebrien - Carrigoginniol was the name of the Eoghanacht cantred here, belonging to the O'Kiarwicks (afterwards to the O'Briens). Mac Ui Bhrian (Mac Brien) is a sept name here. The MacSheehy clan, along with the O'Hallinans, are cited as chiefs of Ballyhallinan. The MacSheehys were a gallowglass clan arriving in the Ireland in the 14th century and from Connaught in the 15th century to serve as bodyguards to the Fitzgeralds, earls of Desmond. MacArthur and O'Scanlan are noted in the barony of Pubblebrien.
Shanid - A portion of the ancient tribal territory of the Uí Fidgeinti. In later times Shanid Castle was a principal seat of the Fitzgeralds, Earls of Desmond.
Small County - O'Ciarmaic (O'Kirwick and Kirby) served as chiefs of Eoghanacht Ani (Ani Cliach) centered in the parish of Knockaney. O'Kirby and O'Muldoon are referenced as kings of Aine (Eoghanacht Aine). O'Cuning (Gunning) is cited as chief of Crioch Saingil and and Aosgreine here. O'Luain (O'Loane or Lambe) were lords of Deisbeg in this barony prior to the arrival of the Anglo-Normans.
Misc - The O'Berga served as chiefs of Ui Rossa (Tuath Rossa). Septs of the Uí Fidgeinti included O'Donovan, O'Collins, O'Flannery, and Lyons, among others. An O'Keeffe sept is referenced as chief of Triocha-Cead-an-Chaliadh in Limerick. An O'Casey (O'Cahassy) sept was seated at Liscannon, near Bruff.

County Tipperary [12 baronies]
All - Anciently inhabited by the Coriondi according to one Ptolemy translation. In the 5th century the south of the county was known as Magh Femin, afterwards North Desie, with the chiefs centered at Cashel. The Butler family were Earls of Ormonde and owned much of the county from the 13th century. The County of Tipperary in the 13th Century extended as far north as Birr in County Offaly and embraced this larger territory until l605 when the O'Carroll areas of Ballybritt and Clonlisk were separated and annexed to Offaly by King James.
Clanwilliam - The O'Cuircs (O'Quirkes) were noted here in the 11th and 12th centuries as kings of Muscraige Cuirc, sometimes called O'Quirkes Country. The O'Heffernans are cited here after being displaced by the Ryans from Owney and Owneybeg baronies.
Eliogarty - O'Fogartaigh (O'Fogarty) were chiefs of Hy Fogarta, the territory about Thurles which also had been known as Eoghanacht. They were also know as Kings of Ely, ruling over southern Ely, while Cearbhal, the O'Carrols of Ely, ruled over northern Ely. O'Spealain is given as a chief of Ui Luighdeach before the rise of the O'Dwyers when they moved on into Cork and Kerry. Following the 12th century the Purcells were Barons of Loughmoe here.
Iffa and Offa (East) -
Iffa and Offa (West) -
Ikerrin - Anciently called Hy Kerrin (Ui Cairin). O Meachair (O'Meagher) is cited as chief of Ui Cairin, a division of Éile (Ely). Cearbhal, or O'Carroll, of Ely were princes of Ely which comprised much of the baronies of Ikerrin and Eilogaty as well as Clonlesk in Co. Offaly.
Kilnamanagh (Lower) - A chief seat of O Duibhir (O'Dwyer), chief of Ui Amhrith. Kilnamanagh may have been formed from the old half-baronies of Kilnalongurty and Ileigh, aka Ely O'Fogarty.
Kilnamanagh (Upper) - A chief seat of O Duibhir (O'Dwyer), chief of Ui Amhrith. O'Spealain (O'Spillane) is given as a chief of Ui Luighdeach (of Eile) before the rise of the O'Dwyers when they moved on into Cork and Kerry.
Middlethird - The territory named Tuath Corcu Áthrach Ele is noted here in ancient times. The Eoghanacht Mor were early princes (e.g. O'Sullivan) in this territory until the coming of the Normans.
Owney and Arra - O'Cuillen (O'Cullen or Collins) were cited as chief of Eoghanacht Aradh. Mac Eochaid (MacKeogh) were cited as chief of Uaithni Tire, or Owney, which also included the barony of Owneybeg in Co. Limerick. The O'Maoilriain (O'Mulryan or O'Ryan) were cited as chiefs of 'Owney Mulryan' which included both Owney and Owneybeg. Another sept here included Mac Ui Bhrian (Mac I Brien), lords of Owney and Arra, their territory anciently referred to as Aradh Cliach and acquired from the O'Donegans around 1300. O'hIfearnain (O'Heffernan) is cited as chief of Uaithne Cliach here prior to the Ryans. The 'Book of Rights' cites the "four tribes of Owney" as O'Heffernan, MacKeogh, O Loingsigh (Lynch) and O'Calahan.
Ormond (Lower) - Ormond comes from 'East Munster'. The pre-Norman territory in both the Ormond baronies was known as Muscraige Thire, held by the O'Kennedy clan. O'Hogan was seated here at Ardcony. An O'Donnelly sept is also cited as originating here. The O'Lonergans were ancient chiefs of Cahir (Corca Eathrach) before being driven out by the Butlers in the 14th century. The Butlers became the powerful Earls of Ormonde.
Ormond (Upper) - The O'Mearaidhe (O'Meara) clan held extensive territories (Ui Fahy) anciently here, centered at Toomyvara. The Dalcassian Ó hÓgáin (Hogan) sept are cited here with extensive territory as Chiefs of Croich Cian. The O Cinneide (O'Kennedy) were chiefs of Glen Omra and princes of Ormond. They were of the Dalcassian tribes from Clare and held their rank from the 12th to the 16th century.
Slievardagh - Corcoran is cited as chief in the parish of Killenaule prior to the late 12th century.
Misc - MacCorcoran is cited to be chief of Clan Ruainni. O'Duinechair (Dannaher) is given as hereditary chiefs of Eoghanacht Uaithne Ageamar. O'Riada (O'Reidy) is given as King of Aradh.

County Waterford [8 baronies]
All - Prior to the Norman invasion the O'Bric and O'Phelan (O'Whelan) septs were chiefs in the Decies, as Waterford was previously known as (and still referred to). The le Poer (Power) family, of Norman origin, held sway after receiving the county as a grant in 1177.
Coshmore & Coshbride - major surnames among landowners in the mid-19th century included Ahern, Barry, Keane, Tobin, Walsh. The Desmond Fitzgeralds built a number of castles here in the 15th century.
Decies within Drum - O'Bric, lords of south Desi, later driven out by the Eugenians of Desmond. Deiseach may have been an area here from which the Deasey clan originated. O'Cein or O'Kean were centered here as chiefs of Hy Fodhladha on the borders of Waterford and Tipperary. The le Poer (Power) family held much of the baronies of Decies and Upperthird.
Decies without Drum - The O’Neills of Magh da chonn were centered in the Decies.
Gaultiere - The Anglo and Norman families of Anthony, Brunnock, Comerford, Everard, Grant, Jackson, Mandeville, Sherlock, Wadding and Wyse possessed the territory here called Gal-tir (country of the foreigners).
Glenahiry - The MacCairbre (Carbery) family is cited here.
Middlethird - Anciently referred to as Magh Femin, this area was annexed as part of the Deisi about the 6th century.
Upperthird - The O'Flanagans of Uachtar Tire ("Upper Country") are given here before being usurped by the Le Poer (Power) family after the 12th century.
Waterford City - The city grew around Viking settlements of the 9th and 10th centuries.
Misc - In 1204 the Cantred of Dungarvan, one of three held by Donal O'Faolain of the Decies, was escheated and the Justiciary was commanded to take it into the King's hands.

Further Reference at this subject:
Ireland's History in Maps - Home Page