County Monaghan [5 baronies]

The North Gaels, between about A.D. 1 and 400 expanded their foothold in the northwest of Ireland and established themselves as Sacral ("totemistically" sacred) High-Kings at the ancient site of Tara near Dublin with the aid of their allies, the Laiginian tribe of Airgialla. It is likely that before the Gaels arrived and absorbed Bute into the Cenél Comgall of Dál Riata that the island was home to a people who spoke a Brythonic language (akin to modern day Welsh). Later during the Viking period the island was known as Rothesay and the main town on the island was Bute.

The ancient kingdom of Airgialla (Oriel) was formed around AD 330. At one time, it included the southern parts of the modern counties of Tyrone and Derry, as well as much of Armagh, Monaghan and Fermanagh with its royal site at Clogher. Monaghan and Tyrone counties was inhabited in the time of Ptolemy by the Scoti, who then possessed all the inland parts of Ireland. The Romans never invaded Ireland, which they called Scotia, although they traded with the inhabitants, the Gaels, or the Scots as they were also known. Monaghan afterwards formed part of the district of Oriel or Orgial, which also comprehended Louth and part of Armagh; but it was more generally known by the name of Mac Mahon's country.

The Mugdorna (Located in western Co. Cavan and northern Co. Meath) occupied this territory prior to 800 AD, when they were pushed out of Meath and into Monaghan and replaced by the Gailenga. The Gailenga Mora left their name in the barony of Morgallion (Machaire Gailenga, "the plain of the Gailenga") in County Meath. Over six centuries later, in the 13th century, Ros is still in the land of the Mugdorna, as indeed is Donaghmoyne.

The word Ulster itself is derived from the Viking word Uladztír, based on the Irish words Ulaidh and Tír. Once the Vikings began to raid in 795, Ireland was permanently occupied, wholly or partly, by foreigners. The Viking tide was turned by Muircertach of the Leather Cloaks, Niall Glundubh's son and successor. His base was the Grianan of Aileach near Derry. By the 9th century Airgialla proper, as a political entity, was practically confined to the modern counties Armagh, Monaghan, Fermanagh, and part of Louth, with the Uí Thuirtri kingdom in east Tyrone in process of being absorbed into the Cenél nEógain over-kingdom of Ailech.

Skye, by the end of the sixth century was an island divided, with a mainly Gaelic presence in the South end consisting of the original Celtic stock from Ireland, and an influx of the ambitious Dalriadan Gaels, while in the North the Picts had become the predominant force. King William the Lion of Scotland seized control of Bute consisting of Great Cumbray Island - but he and his descendants had to defend their western territory from the Vikings. In 1230 King Hakon of Norway sent a force to Bute to retake it - and were confronted by the Scots in a castle overlooking Rothesay Bay.

The Cenél Eoghan were the Royal Clan of the North Gaels, associated with the High-Kingship of Tara with their centrally dominant fortress of Aliech in northeast Donegal. Their original patrimony included the modern baronies of Raphoe and lnishowen in Donegal, but from their center at the great fort of Ailech in Inishowen, they soon spread throughout Derry and much of Tyrone. Until the mid-thirteenth century the leading family of the Cenél Eoghain was MacLoughlin (Mac Lochlainn) of lnishowen; in 1241 they lost a decisive battle to their kinsmen the Ó Neills, and afterwards they declined in power, though a branch became established in County Leitrim under the O’Rourkes. The O’Hegartys (O hEighceartaigh) of the Cenél Eoghain were chiefs in the present barony of Loughinsholin in the south of County Derry, and by about the beginning of the seventeenth century some of them settled in the baronies of Barrymore and Carbery West in County Cork.

 

Cremorne
  • Up to about 800 A.D. the Mugdorna territory stretched from Monaghan, where it is preserved in the name Cremourne (Cru­ch Mugdorna "the territory of the Mugdorna"), south to the Boyne at Navan.

  • The O'Lohan or O'Loughan (Ui Leochaín) sept were lords of the Gailenga Mor before being driven across the Shannon after the arrival of the Normans. The Ua hAonghusa (O'Hennessy) sept of Gailenga Becc was located on the Co. Dublin/Meath border. The Gaileanga have an early genealogy tradition back to the Eugenians Ailella Auluimm (Oilill Olum).

  • O'Hanraghty (Hanratty) settled in this barony from Uí Meith Macha in Co. Louth following the Norman invasion.

  • The Leslie family is cited in more recent times as Lords of Rothes. The first recorded arrival of the Gallowglass was in 1259. Prince Aedh O’Connor of Connaught, son of King Feidhlim married a princess, daughter of Dubhgall MacRory King of the Hebrides. The Applecross and O'Beolan Earls of Ross were one and the same, and that they were descended from Gilleoin na h' Airde. Earl William, the last of his line, died without surviving male issue on the 9th of February, 1372, when the title devolved upon his daughter, Euphemia, Countess of Ross in her own right, whose daughter, Mary, or Margaret, by Sir Walter Leslie, carried the earldom to Donald of Harlaw, second Lord of the Isles. That the O'Beolan Earls of Ross, of whom Ferquhard Mac an t'Sagairt was the first, descended from the same ancestor, Gilleoin na h' Airde, as the older "Gillandres" earl of 1160, is equally certain. Earl Gillandres as probably forfeited for the part he took against Malcolm IV the Maiden Canmore.
Dartree (Dartraige)
  • The (O) Boylan sept were kings of Dartraige from the 8th century, as well as a chief of Airghialla in the 11th century. The O’Boylans (O Baoigheallain) were of the same stock as the O’Flanagans (O Flannagain) of northwest Fermanagh.

  • Ó Baoigheallain lords of Airgialla, stretched from Fermanagh to Louth. Their reign of power in Oriel was broken by the MacMahons.

  • Dartree was also referred to as Dartaige Coininnsi. There was also a Dartraige centered in Breifne.
Farney
  • The Irish Annals record for the yeare of our Lord 331, "The battle of Achadh Leithdheirg, in Fearnmhagh (Farney), was fought by the three Collas against the Ulstermen, in which fell Fearghus Fogha, son of Fraechar Foirtriun, the last king of Ulster, who resided at Eamhain.

  • Named for the ancient territory of Fernmag. O'Ciaran or O'Kieran is given as a chief of Fearnmuigh as a clan of Tir Eogain.

  • The O'Larkin sept is cited as chiefs alongside the Ó Neills and MacCanns in the old territory of Orghialla, where they were chiefs of Farney and West Uí Breasail (in Co. Armagh).

  • O'Cosgrove (O Cosgraigh) was the name of the chiefs of Feara Ruis (Fir Rois) near Carrickmacross.

  • MacArdle, a branch of the MacMahons of Oriel are noted here, as well as septs of Callan, O'Finn, O'Larkin, Hayes, and O'Donegan.
Monaghan
  • The MacMahons were chiefs in medieval times.

  • The O'Conghaile (O'Connolly) were driven into Monaghan by the Normans. O'Heighigh and O'Mulrooney are cited as chiefs of Oriel, of Muintir Maolruanaidh and of Maoith Leirg Monach. The MacConnon sept moved south from the Clones area in the 11th century to southern Monaghan adjacent to Co Louth.
Trough
  • The Mac Kenna were chiefs of Truagh from which the barony receives its name.

  • O'Clerkin is also noted here.

 

 

Prior to the 4th century the county was said to be inhabited by the Manaigh or Monaigh. Monaghan was part of the ancient territory of Oirghialla (Oriel), held by Uí Cremthainne septs and the Clan Colla (e.g. O'Carroll) from the 4th to the 12th centuries. Territories bordering or within Uí Cremthainne included Fernmag and Dartraige. In later times it was generally referred to as Mac Mahons country. In the mid-16th century the county was described as containing the countries of Iriell, Dartrey, Loghtie, and Trow. In 1585 the county was formed from the five baronies of Truagh, Dartrey, Monaghan, Cremorne and Farney.

In the old Gaelic system of land division, Monaghan was part of the Kingdom of Oriel. Analysis of the Hearth Money Rolls of 1663 shows that the commonest names in the county at the time (in descending order) were McMahon, McKenna, O'Duffy, O'Connolly, McCabe, McWard, McArdle, McIlmartin, O'Byrne, O'Callan, McCallan, O'Kelly, O'Murphy, McNancy, McTreanor, O'Gowan or McGowan, O'Boylan, McIlcollin, O'Finnegan, O'Cassidy, and McPhilip.