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...

An early Welsh genealogical tract links him to Gwrtheyrnion, while other descendants of Gwrtheyrnion ruled Maelienydd, Elfael., and Cedewain. These territories...

Ceri Montgomery (part) Powys Radnorshire Cwmwd Deuddor Elfael Glasbury Gwrtheyrnion Maelienydd Radnor Brecknockshire Blaenllyfni Brecon Builth Hay Monmouthshire...

of Vortigern Vortigern (c. 365 High-King Gwrtheyrn), ruled Buellt and Gwrtheyrnion Cadeyern Fendigaid (c. 400, Cedehern/Cateyrn ap Gwrtheyrn) Rhuddfedel...

Old Welsh: Fernmail map Teudur; fl. c. 830) was a king of Buellt and Gwrtheyrnion in medieval Wales. Little is known of him besides a pedigree included...

war with Llywelyn ap Gruffudd when the latter invaded his lordship of Gwrtheyrnion or Rhayader. This war would continue intermittently until the deaths...

410–920, merged into Deheubarth through inheritance. Powys Brycheiniog Gwrtheyrnion Buellt Pengwern Elfael Maelienydd Morgannwg Glywysing Gwent Ergyng Dumnonia...

Llywelyn aggressively pursued his interests and gained control of lands in Gwrtheyrnion, driving out his cousin, the Anglo-Norman, Roger Mortimer. Then to Powys...

Ceredigion to the west. It was closely associated with the territories of Gwrtheyrnion, Elfael, and Maelienydd, and as such was often considered part of the...

Ceri Montgomery (part) Powys Radnorshire Cwmwd Deuddor Elfael Glasbury Gwrtheyrnion Maelienydd Radnor Brecknockshire Blaenllyfni Brecon Builth Hay Monmouthshire...

Powys Wenwynwyn Arwystli Cedewain Cyfeiliog Caereinion Mechain Mochnant Gorfynydd Gwynllwg Gŵyr Penychen Senghenydd Gwrtheyrnion Elfael Maelienydd Buellt...

river formed the border between Gwrtheyrnion and the independent state of Buellt; the town of Rhayader is on the Gwrtheyrnion side of the river. Rhys had...

including the cantrefs of Maelienydd and Elfael and the commotes of Gwrtheyrnion and Deuddwr. The act also specified that New Radnor was the county town...

the son of Vortigern, was granted rule over the regions of Buellt and Gwrtheyrnion by Ambrosius. Finally, in Chapter 66, various events are dated from a...

FitzMartin, lord of Cemais. Other daughters married the Welsh rulers of Gwrtheyrnion and Elfael. Turvey p. 111 Turvey pp. 91–92. In a charter concerning a...

and annexes the Perfeddwlad. Gwynedd annexes Brycheiniog, Maelienydd, Gwrtheyrnion and Builth (late 1250s). In order to prevent further invasions by the...

in the area known as Rhwng Gwy a Hafren. It was also associated with Gwrtheyrnion on the east of the Wye, together they formed a cantref. This commote...

presence of the region's administrative centre at Cefnllys. It bordered Gwrtheyrnion to the west and Elfael to the south. Dinieithon was probably part of...

which went to make up the county of Radnorshire in 1536 (the others were Gwrtheyrnion, Maelienydd and Llythyfnwg, the latter being known in English as the...

evidenced before the eighth century. There are mentions of Brycheiniog and Gwrtheyrnion (near Buellt) in that era, but for the latter it is difficult to say...

part of the turbulent area known as the middle march, together with Gwrtheyrnion and Elfael. The castle was viewed as a forward defence against Welsh...

lists include the cantrefs of Elfael and Maelienydd and the commote of Gwrtheyrnion. The cantref of Buellt is also often associated with the region, despite...