Cantref Mawr was a cantref in south-east Wales. It was of strategic importance in medieval Wales as the location of the main seat of the princes of Deheubarth at Dinefwr.
Cantref Mawr means "The Great Cantref". Each cantref in medieval Wales was divided into cwmwdau, and a typical cantref would be made up of two or three cwmwd. Cantref Mawr was made up of seven cwmwdau, which made it one of the largest cantrefs in Wales. Cantref Mawr was an upland area, bounded by the rivers Tywi, Teifi and Gwili. The area at this period was covered in dense scrub which caused difficulties for invading armies, so that the Cantref Mawr often provided a secure refuge for the princes of Deheubarth when facing an invasion.
Rhys ap Gruffydd or ap Gruffudd was the ruler of the kingdom of Deheubarth in south Wales from 1155 to 1197. Today, he is commonly known as The Lord Rhys, in Welsh Yr Arglwydd Rhys, although this title may have not been used in his lifetime. He usually used the title "Proprietary Prince of Deheubarth" or "Prince of South Wales", but two documents have been discovered in which he uses the title "Prince of Wales" or "Prince of the Welsh". Rhys was one of the most successful and powerful Welsh princes, and, after the death of Owain Gwynedd of Gwynedd in 1170, the dominant power in Wales.
Hywel ap Cadell, commonly known as Hywel Dda, which translates to Howel the Good in English, was a Welsh king who ruled the southern Welsh kingdom of Deheubarth and eventually came to rule most of Wales. He became the sole king of Seisyllwg in 920 and shortly thereafter established Deheubarth, and proceeded to gain control over the entire country from Prestatyn to Pembroke. As a descendant of Rhodri Mawr through his father Cadell, Hywel was a member of the Dinefwr branch of the dynasty. He was recorded as King of the Britons in the Annales Cambriæ and the Annals of Ulster.
Deheubarth was a regional name for the realms of south Wales, particularly as opposed to Gwynedd. It is now used as a shorthand for the various realms united under the House of Dinefwr, but that Deheubarth itself was not considered a proper kingdom on the model of Gwynedd, Powys, or Dyfed is shown by its rendering in Latin as dextralis pars or as Britonnes dexterales and not as a named land. In the oldest British writers, Deheubarth was used for all of modern Wales to distinguish it from Hen Ogledd, the northern lands whence Cunedda originated.
The Kingdom of Gwynedd was a Welsh kingdom and a Roman Empire successor state that emerged in sub-Roman Britain in the 5th century during the Anglo-Saxon settlement of Britain.
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 Powys and part of today's English West Midlands. More precisely, and based on the Romano-British tribal lands of the Ordovices in the west and the Cornovii in the east, its boundaries originally extended from the Cambrian Mountains in the west to include the modern West Midlands region of England in the east. The fertile river valleys of the Severn and Tern are found here, and this region is referred to in later Welsh literature as "the Paradise of Powys".
Aberffraw is a village and community on the south west coast of the Isle of Anglesey, in Wales. The village is 9 miles from the island's capital, Llangefni, and is located is on the west bank of the Afon Ffraw. The community includes Soar and Dothan. Located near the A4080 and the nearest rail station is Bodorgan.
Gruffydd ap Rhys was Prince of Deheubarth, in Wales. His sister was the Princess Nest ferch Rhys. He was the father of Rhys ap Gruffydd, known as 'The Lord Rhys', who was one of the most successful rulers of Deheubarth during this period.
A cantref was a medieval Welsh land division, particularly important in the administration of Welsh law.
Rhys Gryg, real name Rhys ap Rhys, also known as Rhys Fychan, was a Welsh prince who ruled part of the Kingdom of Deheubarth.
Brycheiniog was an independent kingdom in South Wales in the Early Middle Ages. It allied with the Mercian kingdom in the post Roman era, to stabilise and control a central (Marches) area key to dominance over central Proto-England to the east and the south Welsh kingdom of Deheubarth to the west. It was conquered and pacified by the Armorican Normans between 1088 and 1095, though it remained Welsh in character. It was transformed into the Lordship of Brecknock and later formed the southern and larger part of the historic county of Brecknockshire. To its south was the Kingdom of Morgannwg.
Gwent was a medieval Welsh kingdom, lying between the Rivers Wye and Usk. It existed from the end of Roman rule in Britain in about the 5th century until the Norman invasion of Wales in the 11th century. Along with its neighbour Glywyssing, it seems to have had a great deal of cultural continuity with the earlier Silures, keeping their own courts and diocese separate from the rest of Wales until their conquest by Gruffydd ap Llywelyn. Although it recovered its independence after his death in 1063, Gwent was the first of the Welsh kingdoms to be overrun following the Norman conquest.
The Kingdom of Dyfed, one of several Welsh petty kingdoms that emerged in 5th-century sub-Roman Britain in southwest Wales, was based on the former territory of the Demetae. The medieval Irish narrative, The Expulsion of the Déisi, attributing the kingdom's founding to Eochaid, son of Artchorp, being forced across the Irish sea, in the 5th century; his descendants founding the line of the kings of Dyfed, down to "Tualodor mac Rígin". The Normans invaded Wales, and by 1138 incorporated Dyfed into a new shire called Pembrokeshire after the Norman castle built in the Cantref of Penfro and under the rule of the Marcher Earl of Pembroke.
Llywarch ap Llywelyn was an important medieval Welsh poet. He is also known by his bardic name, "Prydydd y Moch".
Ystrad Tywi is a region of southwest Wales situated on both banks of the River Towy, it contained places such as Cedweli, Carnwyllion, Loughor, Llandeilo, and Gwyr. Although Ystrad Tywi was never a kingdom itself, it was historically a valuable territory and was fought over by the various kings of Dyfed, Deheubarth, Seisyllwg, Gwynedd, Morgannwg and the Normans.
Cemais was an ancient cantref of the Kingdom of Dyfed, from the 11th century a Norman Marcher Lordship, from the 16th century a Hundred, and is now part of Pembrokeshire, Wales. It occupied the coastal area between the Teifi estuary and Fishguard, and the northern and southern slopes of the Preseli Hills, covering an area of approximately 140 square miles (360 km2). The Afon Nyfer divided it into two commotes: Cemais Is Nyfer to the north and Cemais Uwch Nyfer to the south.
Cantref Gwarthaf was the largest of the seven cantrefi of Dyfed in southwest Wales. It subsequently became part of Deheubarth in around 950. It consisted of the southeastern part of Dyfed containing most of the basin of the River Tâf, parts of modern-day Pembrokeshire and Carmarthenshire.
Rhwng Gwy a Hafren was a region of medieval Wales, located in the Welsh Marches between Powys to the north and Brycheiniog to the south. It was bounded by the rivers Wye and Severn. It covered about the same territory as Radnorshire, now part of the county of Powys. The region first came into its own in the 9th or 10th centuries, when it was ruled by leaders who operated independently of the surrounding kingdoms. After the Norman invasion, it comprised the central part of the Welsh Marches and was the site of frequent struggles between Welsh and Norman forces.
Creuddyn was a medieval commote and, later, a lordship in Ceredigion, Wales. It was located between the rivers Ystwyth and Rheidol, and was one of the three commotes of Cantref Penweddig. The name, of Old Welsh origin, probably refers to the Pen Dinas hill fort, anciently known as Dinas Maelor. The natural centre of the commote was Llanfihangel y Creuddyn where five roads meet at the village. The name survives in the name of a rural community and church of the same name; however the modern community is much smaller than the medieval commote.
Rhys ap Maredudd was a senior member of the Welsh royal house of Deheubarth, a principality of Medieval Wales. He was the great grandson of The Lord Rhys, prince of south Wales, and the last ruler of a united Deheubarth. He is best known for his leadership of a revolt in south Wales in 1287–88.
Lloyd, J.E. (1911) The history of Wales from the earliest times to the Edwardian conquest (Longman, Green & Co.)