Map of the lands west of Offa's Dyke; Gwrtheyrnion can be seen in the centre
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 (Welsh: Gwrtheyrn). For most of the medieval era, it was associated with the cantref of Buellt and then Elfael, small regional kingdoms whose rulers operated independently of other powers. In the Norman era, like the rest of the region between Wye and Severn it came to be dominated by Marcher Lordships.
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...
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...
Llywelyn aggressively pursued his interests and gained control of lands in Gwrtheyrnion, driving out his cousin, the Anglo-Norman, Roger Mortimer. Then to Powys...
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...
An early Welsh genealogical tract links him to Gwrtheyrnion, while other descendants of Gwrtheyrnion ruled Maelienydd, Elfael., and Cedewain. These territories...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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