Edeirnion or Edeyrnion is an area of the county of

Denbighshire Denbighshire ( ; ) is a county in the north-east of Wales. It borders the Irish Sea to the north, Flintshire to the east, Wrexham to the southeast, Powys to the south, and Gwynedd and Conwy to the west. Rhyl is the largest town, and Ruthi ...

and an ancient

commote A commote (, sometimes spelt in older documents as , plural , less frequently )'' Geiriadur Prifysgol Cymru'' (University of Wales Dictionary), p. 643 was a secular division of land in Medieval Wales. The word derives from the prefix ("together" ...

medieval Wales Wales in the Middle Ages covers the history of the country that is now called Wales, from the departure of the Romans in the early fifth century to the annexation of Wales into the Kingdom of England in the early sixteenth century. This period ...

in the

cantref A cantref ( ; ; plural cantrefi or cantrefs; also rendered as ''cantred'') was a Wales in the Early Middle Ages, medieval Welsh land division, particularly important in the administration of Welsh law. Description Land in medieval Wales was divid ...

of Penllyn. According to tradition, it was named after its eponymous founder Edern or Edeyrn. It was included as a Welsh territory of

Shropshire Shropshire (; abbreviated SalopAlso used officially as the name of the county from 1974–1980. The demonym for inhabitants of the county "Salopian" derives from this name.) is a Ceremonial counties of England, ceremonial county in the West M ...

in the

Domesday Book Domesday Book ( ; the Middle English spelling of "Doomsday Book") is a manuscript record of the Great Survey of much of England and parts of Wales completed in 1086 at the behest of William the Conqueror. The manuscript was originally known by ...

. Edeirnion was nominally a part of the

Kingdom of Powys The Kingdom of Powys (; ) was a Welsh successor state, petty kingdom and principality that emerged during the Middle Ages following the end of Roman rule in Britain. It very roughly covered the northern two-thirds of the modern county of Pow ...

but was often subject to border intrusions by the neighbouring

Kingdom of Gwynedd The Kingdom of Gwynedd (Medieval Latin: ; Middle Welsh: ) was a Wales in the Early Middle Ages, Welsh kingdom and a Roman Empire Succession of states, successor state that emerged in sub-Roman Britain in the 5th century during the Anglo-Saxon ...

. It was the patrimony of prince

Owain Brogyntyn Owain ''Brogyntyn'' ap Madog (fl. 1160–1186) was prince of Powys and the third and illegitimate son of king Madog ap Maredudd, the last king of a united Kingdom of Powys. He was the son of Madog by the daughter of the ''Maer du'' or "black ...

. These rumbling border disputes caused a great deal of friction between the two realms. Edeirnion was occupied and annexed by Gwynedd in the reign of

Llywelyn the Great Llywelyn ab Iorwerth (, – 11 April 1240), also known as Llywelyn the Great (, ; ), was a medieval Welsh ruler. He succeeded his uncle, Dafydd ab Owain Gwynedd, as King of Gwynedd in 1195. By a combination of war and diplomacy, he dominate ...

but briefly returned to Powys following a treaty forced on Gwynedd by England after Llywelyn's death in 1240. The territory was again occupied by Gwynedd after 1267 before being returned again to Powys. This continuing dispute and the appeal by

Llywelyn ap Gruffudd Llywelyn ap Gruffudd ( – 11 December 1282), also known as Llywelyn II and Llywelyn the Last (), was List of rulers of Gwynedd, Prince of Gwynedd, and later was recognised as the Prince of Wales (; ) from 1258 until his death at Cilmeri in 128 ...

Edward I of England Edward I (17/18 June 1239 – 7 July 1307), also known as Edward Longshanks and the Hammer of the Scots (Latin: Malleus Scotorum), was King of England from 1272 to 1307. Concurrently, he was Lord of Ireland, and from 1254 ...

to see the resolution of this dispute settled by Welsh Law was one of the reasons the principalities in the north of Wales were unable to unite in opposition to English hegemony and was a contributing factor to the final war between the

Principality of Wales The Principality of Wales () was originally the territory of the native Welsh princes of the House of Aberffraw from 1216 to 1283, encompassing two-thirds of modern Wales during its height of 1267–1277. Following the conquest of Wales by Edwa ...

and England, which ultimately saw the end of Welsh independence. Edeirnion still exists as a ''bro'', or region, in Denbighshire, located around

Corwen Corwen is a town and community in the county of Denbighshire in Wales. Historically, Corwen was part of the county of Merionethshire. Corwen stands on the banks of the River Dee beneath the Berwyn mountains. The town is situated west of Llang ...

and near the

Berwyn Range The Berwyn range (Welsh (language), Welsh: ''Y Berwyn'' or ''Mynydd y Berwyn'') is an isolated and sparsely populated area of moorland in the northeast of Wales, roughly bounded by Llangollen in the northeast, Corwen in the northwest, Bala, Gw ...

Edeirnion Rural District

Edeirnion Rural District was created under the

Local Government Act 1894 The Local Government Act 1894 ( 56 & 57 Vict. c. 73) was an act of the Parliament of the United Kingdom that reformed local government in England and Wales outside the County of London. The act followed the reforms carried out at county leve ...

from that part of Corwen Rural Sanitary District which was in the former administrative county of

Merionethshire Merionethshire, or Merioneth ( or '), was Historic counties of Wales, one of the thirteen counties of Wales that existed from 1536 until their abolishment in 1974. It was located in the North West Wales, north-west of Wales. Name 'Merioneth' is a ...

. It consisted of six

civil parish In England, a civil parish is a type of administrative parish used for local government. It is a territorial designation which is the lowest tier of local government. Civil parishes can trace their origin to the ancient system of parishes, w ...

es and covered ; it continued in existence until 1974, when it was abolished, as a result of the

Local Government Act 1972 The Local Government Act 1972 (c. 70) is an act of the Parliament of the United Kingdom that reformed local government in England and Wales on 1 April 1974. It was one of the most significant acts of Parliament to be passed by the Heath Gov ...

, becoming part of the Glyndŵr District of

Clwyd Clwyd ( , ) is a preserved counties of Wales, preserved county of Wales, situated in the north-east corner of the country; it is named after the River Clwyd, which runs through the area. To the north lies the Irish Sea, with the English cerem ...

. In 1901 it had a population of 5,132, which had fallen to 3,925 by 1961.A Vision of Britain Through Time : ''Edeirnion Rural District''
Retrieved 11 January 2010 It was the only part of Merionethshire not included in the Meirionnydd District of

Gwynedd Gwynedd () is a county in the north-west of Wales. It borders Anglesey across the Menai Strait to the north, Conwy, Denbighshire, and Powys to the east, Ceredigion over the Dyfi estuary to the south, and the Irish Sea to the west. The ci ...

. In 1996 Edeirnion became part of

List of former civil parishes

References

Commotes Geography of Denbighshire Former subdivisions of Wales History of Gwynedd Merionethshire {{Denbighshire-geo-stub