
The Kingdom of Breifne or Bréifne (), anglicized as Breffny, was a medieval
overkingdom in
Gaelic Ireland
Gaelic Ireland () was the Gaelic political and social order, and associated culture, that existed in Ireland from the late Prehistory of Ireland, prehistoric era until the 17th century. It comprised the whole island before Anglo-Norman invasi ...
. It comprised what is now
County Leitrim
County Leitrim ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Connacht and is part of the Northern and Western Region. It is named after the village of Leitrim, County Leitr ...
,
County Cavan
County Cavan ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Ulster and is part of the Northern and Western Region. It is named after the town of Cavan and is based on the hi ...
and parts of neighbouring counties, and corresponds roughly to the
Roman Catholic Diocese of Kilmore. It had emerged by the 10th century, as a confederation of ' headed by an overking drawn from the
Uí Briúin Bréifne.
By the 11th century, Bréifne was ruled by the
Ua Ruairc (O'Rourke) dynasty. The kingdom reached the height of its power in the 12th century, under
Tigernán Ua Ruairc. During the latter part of his reign, Bréifne took part in campaigns against the
Norman invasion of Ireland
The Anglo-Norman invasion of Ireland took place during the late 12th century, when Anglo-Normans gradually conquered and acquired large swathes of land in Ireland over which the monarchs of England then claimed sovereignty. The Anglo-Normans ...
. His assassination by the
Anglo-Normans
The Anglo-Normans (, ) were the medieval ruling class in the Kingdom of England following the Norman Conquest. They were primarily a combination of Normans, Bretons, Flemings, French people, Frenchmen, Anglo-Saxons and Celtic Britons.
Afte ...
in 1172 was followed by a succession dispute, and a conflict between the Ua Ruairc and
Ua Raghallaigh (O'Reilly) dynasties.
Following the
Battle of Magh Slecht in 1256, Bréifne split into
West Breifne
The Kingdom of West Breifne (Irish: ''Breifne Ua Ruairc'') or Breifne O'Rourke was a historic kingdom of Ireland that existed from 1256 to 1605, located in the area that is now County Leitrim. It took its present boundaries in 1583 when West Br ...
(ruled by the Ua Ruairc) and
East Breifne
The Kingdom of East Breifne or Breifne O'Reilly (; , ) was an historic kingdom of Ireland roughly corresponding to County Cavan that existed from 1256 to 1607 in Ireland, 1607. It took its present boundaries in 1579 in Ireland, 1579 when East Br ...
(ruled by the Ua Raghallaigh).
Bréifne was part of the province of
Connacht
Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uí Fiachrach, Uí Briúin, Uí Maine, C ...
until the reign of
Queen Elizabeth I
Elizabeth I (7 September 153324 March 1603) was Queen of England and Ireland from 17 November 1558 until her death in 1603. She was the last and longest reigning monarch of the House of Tudor. Her eventful reign, and its effect on history ...
. In that time it was shired into the modern
counties
A county () is a geographic region of a country used for administrative or other purposesL. Brookes (ed.) '' Chambers Dictionary''. Edinburgh: Chambers Harrap Publishers Ltd, 2005. in some nations. The term is derived from the Old French denoti ...
Cavan and Leitrim, Leitrim remaining a part of the province of Connacht while Cavan became part of
Ulster
Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
.
History

is said to derive from an obsolete
Irish word meaning "hilly", a description which describes the topography of this part of Ireland. But this derivation is opposed by the likes of O'Connell and MacEoin. It was referred to as ''the rough third of Connacht''. Alternatively, the
Metrical states the name is derived from '', daughter of , the grandson of
Nemed, a brave soldier-woman''. She was slain by Regan after whom
Tomregan is supposedly named.
In ancient times the area that became known as Bréifne was said to be occupied by the Erdini, called in Irish 'Ernaigh', who possessed the entire country bordering
Lough Erne
Lough Erne ( , ) is the name of two connected lakes in County Fermanagh, Northern Ireland. It is the second-biggest lake system in Northern Ireland and Ulster, and the fourth biggest in Ireland. The lakes are widened sections of the River E ...
.
At the time of the
Christianization
Christianization (or Christianisation) is a term for the specific type of change that occurs when someone or something has been or is being converted to Christianity. Christianization has, for the most part, spread through missions by individu ...
of Ireland (c. 5th–6th century), groups believed to be in or near Breifne included the Glasraighe,
Masraige, Dartraige, Armhaighe, Gallraighe, the Fir Manach, and the
Gailenga.
Around the 6th century, a people known as the Conmaicne Rein are thought to have moved north from around the present
Dunmore in
County Galway
County Galway ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Northern and Western Region, taking up the south of the Provinces of Ireland, province of Connacht. The county population was 276,451 at the 20 ...
and settled in Magh Rein (the area around
Fenagh). From here they peopled what is now South Leitrim, which became known as Magh Rein, and its inhabitants as the Conmaicne Magh Rein.
They consisted of different family groupings – Muintir Eolais, Muintir Cearbhallain (O Mulvey), and Cinel Luachain, among others.
About the 8th century, the area since known as Breifne was conquered and settled by the
Uí Briúin Bréifne who were a branch of the royal family of
Connacht
Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uí Fiachrach, Uí Briúin, Uí Maine, C ...
. The Uí Briúin established themselves first in modern county Leitrim and then into what is now
County Cavan
County Cavan ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Ulster and is part of the Northern and Western Region. It is named after the town of Cavan and is based on the hi ...
. It can be argued that there is no contemporary evidence to support these speculations.
By the 9th century, the Ó Ruaircs had established themselves as kings of Breifne.
In the 10th and 11th centuries, the Ó Ruairc kings of Breifne fought some battles for the title of king of Connacht, with four different kings of Breifne gaining the title.
During the 12th century the reign of Tighearnán Ua Ruairc, the kingdom of Breifne was said to comprise most of the modern counties of
Leitrim and
Cavan
Cavan ( ; ) is the county town of County Cavan in Republic of Ireland, Ireland. The town lies in Ulster, near the border with County Fermanagh in Northern Ireland. The town is bypassed by the main N3 road (Ireland), N3 road that links Dublin ( ...
, and parts of
Longford
Longford () is the county town of County Longford in Ireland. It had a population of 10,952 at the 2022 census. It is the biggest town in the county and about one third of the county's population lives there. Longford lies at the meeting of ...
,
Meath,
Fermanagh
Historically, Fermanagh (), as opposed to the modern County Fermanagh, was a kingdom of Gaelic Ireland, associated geographically with present-day County Fermanagh. ''Fir Manach'' originally referred to a distinct kin group of alleged Laigin or ...
and
Sligo
Sligo ( ; , meaning 'abounding in shells') is a coastal seaport and the county town of County Sligo, Ireland, within the western province of Connacht. With a population of 20,608 in 2022, it is the county's largest urban centre (constituting 2 ...
.
In the 16th century ''Breifne O'Rourke'' eventually became
County Leitrim
County Leitrim ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Connacht and is part of the Northern and Western Region. It is named after the village of Leitrim, County Leitr ...
and ''Breifne O'Reilly'' became
County Cavan
County Cavan ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Ulster and is part of the Northern and Western Region. It is named after the town of Cavan and is based on the hi ...
.
Territories
The following territories were at one stage part of Breifne.
*
Cenél Cairpre (Cairbre) – northern
County Sligo
County Sligo ( , ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Northern and Western Region and is part of the Provinces of Ireland, province of Connacht. Sligo is the administrative capital and largest town in ...
and northeast
County Leitrim
County Leitrim ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Connacht and is part of the Northern and Western Region. It is named after the village of Leitrim, County Leitr ...
. The territory of
Coirpre, son of
Niall of the Nine Hostages
Niall Noígíallach (; Old Irish "having nine hostages"), or Niall of the Nine Hostages, was a legendary, semi-historical Irish king who was the ancestor of the Uí Néill dynasties that dominated Ireland from the 6th to the 10th centuries. ...
, around the 6th century extended from the
Drowes west to the
Owenmore River in
Ballysadare
Ballysadare (), locally also Ballisodare, is a town in County Sligo, Ireland. It is about south of Sligo town. The town developed on an important crossing of the Owenmore River. Ballysadare is in a townland and civil parish of the same name.
...
.
Duncarbry (''Dun Chairbre'') marks the border of Cairbre's territory on the Drowes, while the
Barony of Carbury in North Sligo still reminds us also today.
Noted chiefs of Cenél Cairpre included Ó Maolchloiche (O'Mulclohy).
*
Cairpre Gabra – northern
County Longford
County Longford () is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Leinster. It is named after the town of Longford. Longford County Council is the Local government in the Republic ...
,
barony of Granard. Ó Ronáin (O'Ronan) were lords in the barony of Granard until dispossessed by the Ó Fearghails in the 13th century.
According to the ''
Annals of the Four Masters
The ''Annals of the Kingdom of Ireland'' () or the ''Annals of the Four Masters'' () are chronicles of Middle Ages, medieval Irish history. The entries span from the Genesis flood narrative, Deluge, dated as 2,242 Anno Mundi, years after crea ...
'', about 476 AD, the Battle of Granard was fought by Eochaidh, son of Cairbre, son of Oilioll, son of Dunlaing, son of Enda Niadh against the
Ui Dunlainge,
Ui Briúin Cualann and
Ui Fergusa of North
Leinster
Leinster ( ; or ) is one of the four provinces of Ireland, in the southeast of Ireland.
The modern province comprises the ancient Kingdoms of Meath, Leinster and Osraige, which existed during Gaelic Ireland. Following the 12th-century ...
.
*
Cenél Laegaire –
County Fermanagh
County Fermanagh ( ; ) is one of the thirty-two counties of Ireland, one of the nine counties of Ulster and one of six counties of Northern Ireland.
The county covers an area of and had a population of 63,585 as of 2021. Enniskillen is the ...
. The Fir Manach, the
Cinéal Eanna and the
Cenél Laegaire were early indigenous tribes in the County Fermanagh area. The Cenél Laegairi mic Neill were noted west of Loch Erne (Book of Lecan). The Cenél Laegairi mic Neill were also noted in central Ireland (Mide, Meath).
Kings of Breifne
''Note: Where mentioned spelling used in the document is used here.''
Early kings
*
Echu Mugmedón, father to Brión,
Fiachra, and
Niall (of the Nine Hostages).
*
Brión: son of Echu Mugmedón and the ancestor of the Uí Briúin Kings of Connacht.
*
Aodh Fionn mac Fergna: king of Breifne
*
Maenach mac Báithin: king of Ui Briuin Breifne – c.653
*
Dub Dothra: king of the Ui Briuin &
Conmaicne & Breifne – c.743
*
Cormacc mac Duibh Dá Críoch: king of Breifni – c.790
*
Muircheartach mac Donnghal, king of Breifne: c.800–806
*
Mael Dúin mac Échtgal, king of Breifne: died 822
*
Ceallach son of Cearnach, son of Dubh Dothra, king of Breifne
*
Tighearnán mac Seallachan, king of Breifne: c.888 – father of Ruarc
*
Ruarc mac Tighearnáin, lord of Ui Briuin Breifne: c. 893 – grandfather of Sean Fergal
*
Flann mac Tighearnáin, lord of Breifne: c.910
*
Cernachan mac Tighearnáin, king of Breifne: died 931
*
Conghalach mac Cathaláin, lord of Breifne: c.935
*
Cléircén son of Tigernán, king of Bréifne: C. 937
*
Fergal? ua Ruairc, king of Bréifne
Ó Ruairc dynasty, Kings of Bréifne, c. 964–1257
* (Sean) Fergal Ó Ruairc king of Connacht and Breifne: c.964–67
* Niall Ó Ruairc, heir of Breifne: 1000–1001
* Aedh Ó Ruairc, king of Breifne: died 1014–1015 – son of Fergal
* Art an caileach Ó Ruairc, king of Breifne: c.1020–1030? – son of Fergal
* Aedh Ó Ruairc, lord of Dartraige: 1029
* Art uallach (oirdnidhe) Ó Ruairc, king of Connacht and Breifne: c.1030–1046 – son of Aedh mac Fergal
* Niall Ó Ruairc, king of Breifne Connacht: 1047 – son of Art uallach
* Domnall Ó Ruairc, lord of Breifne: c.1057 – son of Niall
* Cathal Ó Ruairc, lord of Breifne: c.1051–1059 – son of Tighernan
* Aedh in Gilla Braite Ó Ruairc, king of Breifne: 1066 – son of Niall, son of Art Uallach
* Aed Ó Ruairc, king of Connacht & Breifne: c.1067–1087 – son of Art Uallach
* Donnchadh cael Ó Ruairc, king of Breifne: c.1084 – son of Art an caileach
* Ualgharg Ó Ruairc, royal heir of Connacht: 1085 – son of Niall, son of Art uallach
* Donnchadh Ó Ruairc, lord of Ui Briuin and Conmaicne: 1101 – son of Art Uí Ruairc
* Domnall Ó Ruairc, king of Connacht and Breifne: c.1095–1102 – son of Tigernán son of Ualgharg
* Cathal Ó Ruairc, lord of Ui Briuin Breifne and Gailenga: 1105 – son of Gilla Braite, son of Tigernán
* Domnall Ó Ruairc, lord of Ui Briúin: c.1108 – son of Donnchadh
* Aedh an Gilla Sronmaol Ó Ruairc king of Conmaicne: c.1117–1122 – son of Domnall (or Donnchadh).
*
Tigernán mór Ó Ruairc, king of Breifne: c.1124–1152, 1152–1172 – son of Donnchad macDomnail
* Aedh Ó Ruairc, king of Breifne: 1152–1152, 1172–1176 – son of Gilla Bruide, son of Domnall
* Amlaíb Ó Ruairc, king of Breifne: 1176–1184 – son of Fergal, son of Domnall, son of Tigernán
* Aedh Ó Ruairc, king of Breifne: 1184–1187 – son of Máelsechlann, son of Tigernán mór
* Domnall Ó Ruairc, lord of the greater part of Breifne: c.1207 – son of Ferghal mac Domnall, son of Fergal
* Ualgarg Ó Ruairc, king of Breifne: c.1196–1209 – son of Cathal, son of Aedh, son of Donnchadh
* Art Ó Ruairc, king of Bréifne: 1209–1210 – son of Domnall, son of Fergal, son of Domnall
* Niall O'Ruairc, king of Dartry and clann Fermaige: 1228 – son of Congalach, son of Fergal, son of Domnall
* Ualgarg Ó Ruairc, king of Breifne: c.1210–1231 – son of Cathal, son of Aedh, son of Donnchadh
* Cathal riabach O'Ruairc, king of Bréifne: 1231–1236 – son of Donnchadh, son of Aedh, son of Gilla Braite
* Conchobar O'Ruairc, king of Bréifne: 1250?–1257 – son of Tigernán, son of Domnall, son of Cathal
Lords of Bréifne Ó Ruairc, 1257–1605
* Sitric Ó Ruairc, king of Bréifne: elected and killed 1257–1257 – son of Ualgarg, son of Cathal
* Amlaíb Ó Ruairc, king of Breifne West: 1257–1258 – son of Art, son of Domnall, son of Fergal
* Domnall Ó Ruairc, king of Breifne: 1258 to 1258 (deposed) – son of Conchobar, son of Tigernán
* Art Ó Ruairc, king of Breifne East: 1258–1259 (deposed) – son of Cathal riabach, son of Donnchadh
* Domnall Ó Ruairc, king of Breifne: 1259 to 1260 (killed) – son of Conchobar son of Tigernán
* Art Bec Ó Ruairc, king of Breifne West: 1260–1260 (killed) – son of Art son of Domnall son of Fergal
* Art Ó Ruairc, king of Breifne: 1261–1266 (deposed)– son of Cathal riabach son of Donnchadh
* Conchobar Buide Ó Ruairc, king of Breifne: 1266–1273 – son of Amlaíb, son of Art
* Tigernán Ó Ruairc, king of Breifne: 1273–1274 – son of Aedh, son of Ualgarg, son of Cathal
* Art Ó Ruairc, king of Breifne: 1275–1275 – son of Cathal riabach, son of Donnchadh
* Amlaib Ó Ruairc, king of Breifne: 1275?–1307 – son of Art, son of Cathal riabach
* Domnall Carrach Ó Ruairc, king of Breifne: 1307–1311 – son of Amlaíb, son of Art
* Ualgarg Mór Ó Ruairc, king of Breifne: 1316–1346 – son of Domnall carrach
* Flaithbheartach Ó Ruairc, king of Breifne: 1346–1349 (deposed) – son of Domnall carrach
* Aodh Bán Ó Ruairc, king of Breifne: 1349–1352 – son of Ualgarg mór, son of Domnall
* Flaithbheartach Ó Ruairc, king of Breifne: 1352–1352 (died) – son of Domnall carrach
* Tadhg na gCaor Ó Ruairc, king of Breifne: 1352–1376 – son of Ualgarg mór son of Domnall carrach
* Gilla Crist Ó Ruairc, lord of Breifny: died 1378 – son of Ualgarg mór, son of Domnall carrach
* Tigernán mór Ó Ruairc, king of Breifne: 1376–1418 – son of Ualgarg mór, son of Domnall carrach
* Aodh buidhe Ó Ruairc, king of Breifne: 1418–1419 – son of Tigernán mór
* Tadhg Ó Ruairc, king of West Breifne: 1419–1424 – son of Tigernán mór
* Art Ó Ruairc, king of East Breifne: 1419–1424 – son of Tadhg na gcoar
* Tadhg Ó Ruairc, king of Breifne: 1424–1435 – son of Tigernán mór
* Lochlann Ó Ruairc, king of East Breifne: 1435–1458 – son of Tadhg na gcoar
* Donnchadh bacagh Ó Ruairc, king of West Breifne: 1435–1445 – son of Tigernán mór?
* Donnchadh Ó Ruairc, king of West Breifne: 1445–1449 – son of Tigernán óg, son of Tigernán mór
* Tigernán óg Ó Ruairc, king of Breifne: 1449–1468 – son of Tadhg, son of Tigernán mór
* Donnchadh losc Ó Ruairce, king of Breifne: 1468–1476 – son of Tigernán mór, son of Ualgarg mór
* Domnall Ó Ruairc, king of Breifne: 1468–1476, – son of Tadhg, son of Tigernán mór
* Feidhlimidh Ó Ruairc, king of Breifne: 1476–1500 – son of Donnchadh son of Tigernán óg
* Eóghan Ó Ruairc, king of Breifne: 1500–1528 – son of Tigernán óg son of Tadhg
* Feidhlimidh Ó Ruairc, king of Breifne: 1528–1536 – son of Feidhlimidh, son of Donnchadh
* Brian ballach mór Ó Ruairc, king of Bréifne, 1528–1559, 1560–1562 – son of Eóghan, son of Tigernán óg
* Tadhg Ó Ruairc, king of Breifne: 1559–1560 – son of Brian ballach
* Aodh gallda Ó Ruairc, king of Breifne: 1562–1564 – son of Brian ballach
* Aodh buidhe Ó Ruairc, king of Breifne: 1564–1566 – son of Brian ballach
*
Brian na múrtha O'Rourke, king of Breifne: 1566–1591 – son of Brian ballach
*
Brian óg na samhthach O'Rourke, king of Breifne: 1591–1600 – son of Brian na múrtha
*
Tadhg Ó Ruairc, lord of Breifne: 1600–1605 – son of Brian na múrtha
Lords of Bréifne Ó Raghallaigh (Muintir Maelmordha)
* Godfrey Ua Raghallaigh, lord of Muintir-Maelmordha: 1161
* Cathal Ua Raghallaigh, lord of Muintir-Maelmordha: 1161–1162 – son of Godfrey
* Fergal son of Cu Chonnacht O'Raigillig, King of Dartry and Clann Fermaige: 1239
* Cathal Ua Raghallaigh, lord of Muintir-Maelmordha: 1256
* Con Ua Raghallaigh, chief of Muintir-Maelmordha: 1256–1257
* Matha Ua Raghallaigh, lord of Muintir-Maelmordha: 1282
* Ferghal O'Raigillig, East Breifne: 1282–1293
* Gilla-Isa Ruaid O'Raigillig, East Breifne: ↑1327 or 1330
* Matha son of Gilla-Isa O'Raigillig, East Breifne: 1304
* Mael Sechlainn O'Raigillig, East Breifne: 1328
* Richard
isderdO'Reilly, East Breifne: 1349–1346 or 1349
* Cu Chonnacht O'Reilly, East Breifne: 1362 or 1365 (resigned) – son of Gilla-Isa Ruaid
* Philip O'Reilly, East Breifne: 1365–1366/69 (deposed) – son of Gilla-Isa Ruaid
* Magnus O'Reilly, East Breifne: 1366/69–1366/69 (deposed)
* Philip O'Reilly, East Breifne: 1366/69–1384 – son of Gilla-Isu Ruaid
* Thomas, son of Mathgamain Ua Raighillaigh, king of Muinter-Mailmordha: 1384–1390
* John, son of Philip O'Reilly, East Breifne: 1390–1400 – son of Philip, son of Gilla-Isa-Ruaid
* Gilla-Isa son of Anrig O'Raigillig, East Breifne: 1400–1400
* Maelmordha, son of Cuconnaught O'Reilly, Muintir Reilly: 1403–1411 – son of Cu Chonnacht, son of Gilla-Isa Ruaid
* Richard, son of Thomas O'Reilly, East Breifne: 1411–1418
* Owen, son of John O'Reilly, Muintir-Maelmordha: 1418–1449
* Farrell, son of Thomas O'Reilly, Muintir-Maelmordha: 1450 (deposed) – (AM1450)
* John, son of Owen O'Reilly, Muintir-Maelmordha: 1450–1460 – son of Owen, son of John, son of Philip, son of Gilla-Isa-Roe
* Cathal O'Reilly, Muintir-Maelmordha: 1467
* Turlough, son of John O'Reilly, East Breifne: 1468–1487 – son of John, son of Owen
* John, son of Turlough O'Reilly, East Breifne: 1487–1491
* John, son of Cathal O'Reilly, East Breifne: 1491–1510 – son of Cathal, son of Owen son of John
* Hugh, son of Cathal O'Reilly, East Breifne: 1514
* Owen, son of Cathal O'Reilly, East Breifne:1526
* Farrell, son of John O'Reilly, East Breifne & Conmaicne: 1526–1536 – son of John, son of Cathal
* Maelmordha, son of John O'Reilly, East Breifne: 1537–1565 – son of John, son of Cathal
* Hugh Conallagh O'Reilly, son of Maelmordha O'Reilly, East Breifne: 1583 – son of Maelmordha, son of John
* John Roe, son of Hugh Conallagh O'Reilly, East Breifne: 1583–1596
* Philip, son of Hugh O'Reilly, East Breifne: 1596–1596
* Edmond, son of Maelmordha O'Reilly, East Breifne: 1596–1601 – son of Maelmordha, son of John, son of Cathal
* Owen, son of Hugh Conallagh O'Reilly, East Breifne: 1601–1609
Modern Breifne
The Prince of Breifne is a courtesy title given to the Chieftain O'Rourke in 1994 by the
Office of the Chief Herald of Ireland. In 2003, however, the Chief Herald stopped giving out courtesy titles due to a scandal over the
MacCarthy Mór.
Princes of Breifne
*Geoffrey Philip Colmb O'Rorke, Chieftain
O'Rourke, Prince from 1994 to the current.
*Joseph Martin O'Reilly, Chieftain
O'Reilly
O'Reilly () is a common Irish surname. The O'Reillys were historically the kings of East Bréifne in what is today County Cavan. The clan were part of the Connachta's Uí Briúin Bréifne kindred and were closely related to the Ó Ruairc ( ...
, Self appointed prince from 2017 to the current as Lord of East Breifne. Mr Martin comes from the line of Breifne O’Reilly, from the specific place (in Cavan) of that Royal House. He is a senior member of the noble/royal family O’Reilly of Breifne (Breifne Ua Raighaillaigh) and is an approved member of several royal/noble courts around the world.
See also
*
Gaelic nobility of Ireland
This article concerns the Gaelic nobility of Ireland from ancient to modern times. It only partly overlaps with Chiefs of the Name because it excludes Scotland and other discussion. It is one of three groups of Irish nobility, the others bei ...
*
Bélchú
*
Beara-Breifne Way
* https://royalcourtofbreifne.org/ Royal Court of Breifne
Notes
References
*
* "The Adventures of Sir Lancelot du Lac in Breifne, Ireland", by Tom Smith
* ''
Annals of Connacht''
* ''
Annals of the Four Masters
The ''Annals of the Kingdom of Ireland'' () or the ''Annals of the Four Masters'' () are chronicles of Middle Ages, medieval Irish history. The entries span from the Genesis flood narrative, Deluge, dated as 2,242 Anno Mundi, years after crea ...
''
* ''
Annals of Tigernach
The ''Annals of Tigernach'' (Abbreviation, abbr. AT, ) are chronicles probably originating in Clonmacnoise, Ireland. The language is a mixture of Latin language, Latin and Old Irish, Old and Middle Irish.
Many of the pre-historic entries come f ...
''
* ''
Annals of Ulster
The ''Annals of Ulster'' () are annals of History of Ireland, medieval Ireland. The entries span the years from 431 AD to 1540 AD. The entries up to 1489 AD were compiled in the late 15th century by the scribe Ruaidhrí Ó Luin� ...
''
* ''
Annals of Innisfallen''
*
* ''
Chronicon Scotorum
''Chronicon Scotorum'', also known as ''Chronicum Scotorum'', is a medieval Irish chronicle.
Overview
According to Nollaig Ó Muraíle, it is "a collection of annals belonging to the ' Clonmacnoise group', covering the period from prehistoric ...
''
*
*
in Martin; Moody (1984)
*
in Martin; Moody (1984)
* O'Duignan, Manus. (late 14th century).
Book of Ballymote
The ''Book of Ballymote'' (, RIA MS 23 P 12, 275 foll.), was written in 1390 or 1391 in or near the town of Ballymote, now in County Sligo, but then in the tuath of Corann.
According to David Sellar who was the Lord Lyon King of Arms in ...
. On microfilm in Irish national archives.
*
* ''
Cú Choigcríche Ó Cléirigh ook of Genealogies'. (1642). On microfilm in Irish national archives.
* Mac Fhirbhisigh, Dubhaltach Óg. ''
Leabhar na nGenealach
''Leabhar na nGenealach'' ("Book of Genealogies") is a massive genealogical collection written mainly in the years 1649 to 1650, at the college-house of St. Nicholas' Collegiate Church, Galway, by Dubhaltach MacFhirbhisigh. He continued to add m ...
1650–1666''. On microfilm in Irish national archives.
*
* https://royalcourtofbreifne.org/
Further reading
A 9th century Uí Briúin settlement in County Cavan*
{{DEFAULTSORT:Kingdom of Breifne
Breifne
The Kingdom of Breifne or Bréifne (), anglicized as Breffny, was a medieval overkingdom in Gaelic Ireland. It comprised what is now County Leitrim, County Cavan and parts of neighbouring counties, and corresponds roughly to the Roman Catho ...
Connachta
Gaelic-Irish nations and dynasties
States and territories established in the 9th century
Former kingdoms in Ireland