Dineithon
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; also known as Dineithon or Cefnllys) was a
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" ...
within 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 Maelienydd, in the medieval region of
Rhwng Gwy a Hafren was a region of medieval Wales, located in the Welsh Marches between Kingdom of Powys, Powys to the north and Brycheiniog to the south. It was bounded by the rivers River Wye, Wye () and River Severn, Severn (). It covered about the same territor ...
in
Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...
. It was situated near the modern town of
Llandrindod Wells Llandrindod Wells (; ; ; ) is a town and community (Wales), community in Powys, Wales. It serves as the seat of Powys County Council, and is therefore the administrative centre of Powys. The town was Historic counties of Wales, historically in ...
. The southernmost of the four commotes in
Maelienydd Maelienydd, sometimes spelt Maeliennydd, was a cantref and lordship in east central Wales covering the area from the River Teme to Radnor Forest and the area around Llandrindod Wells. The area, which is mainly upland, is now in Powys. During th ...
, it was also the most important due to its arable land and the presence of the region's administrative centre at
Cefnllys Cefnllys is an abandoned ghost village, formerly a medieval castle town and borough, near Llandrindod Wells in Radnorshire (now part of Powys), Wales. The settlement was founded during the 13th century by the Mortimer family in order to streng ...
. It bordered
Gwrtheyrnion Gwrtheyrnion or Gwerthrynion was a commote in medieval Wales, located in Mid Wales on the north side of the River Wye; its historical centre was Rhayader. It is said to have taken its name from the legendary king Vortigern (). For most of the med ...
to the west and
Elfael Elfael was one of a number of Welsh cantrefi occupying the region between the River Wye and river Severn, known as Rhwng Gwy a Hafren, in the early Middle Ages. It was divided into two commotes, Is Mynydd and Uwch Mynydd, separated by the chai ...
to the south. Dinieithon was probably 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 ...
in the
Early Middle Ages The Early Middle Ages (or early medieval period), sometimes controversially referred to as the Dark Ages (historiography), Dark Ages, is typically regarded by historians as lasting from the late 5th to the 10th century. They marked the start o ...
. In 1093, the
Norman Norman or Normans may refer to: Ethnic and cultural identity * The Normans, a people partly descended from Norse Vikings who settled in the territory of Normandy in France in the 9th and 10th centuries ** People or things connected with the Norma ...
barons
Roger de Montgomery Roger de Montgomery (died 1094), also known as Roger the Great, was the first Earl of Shrewsbury, and Earl of Arundel, in Sussex. His father was Roger de Montgomery, seigneur of Montgomery, a member of the House of Montgomery, and was probab ...
,
Ranulph de Mortimer Ranulph I de Mortimer (''Ralf'', ''Ralph'', ''Raoul de Mortemer'') (born before –died in/after 1104) was a Marcher Lord from the Montgomery lands in the Welsh Marches (border lands between Wales and England). In England, he was Lord of Wigmore ...
, and
Philip de Braose Philip de Braose, 2nd Lord of Bramber ( 1070 – c. 1134) was an Anglo-Norman nobleman and Marcher Lord. Origins Philip was born about 1070 to 1073, the son of William de Braose, 1st Lord of Bramber (d. 1093/96) by his wife Eve de Boissey or ...
conquered the region, and Ralph Mortimer built a motte-and-bailey at Dinieithon to secure his new territory. The native Welsh made a recovery in the area, until Ralph Mortimer II built a masonry castle at Cefnllys, which subsequently became seat of the cantref. Like the rest of Maelienydd, it became part of Radnorshire as part of the
Laws in Wales Acts 1535–1542 The Laws in Wales Acts 1535 and 1542 () or the Acts of Union (), were acts of the Parliament of England under King Henry VIII of England, causing Wales to be incorporated into the realm of the Kingdom of England. The legal system of England ...
.


See also

*
Maelienydd Maelienydd, sometimes spelt Maeliennydd, was a cantref and lordship in east central Wales covering the area from the River Teme to Radnor Forest and the area around Llandrindod Wells. The area, which is mainly upland, is now in Powys. During th ...
*
Cefnllys Castle Cefnllys Castle (, ) was a medieval spur castle in Radnorshire (now part of Powys), Wales. Two successive masonry castles were built on a ridge above the River Ithon known as Castle Bank () in the thirteenth century, replacing a wooden motte-an ...


References

Commotes History of Powys {{Wales-hist-stub