Context: Cunedda ap Edern or Cunedda "Wledig" (5th century) was an important early Welsh leader, and the progenitor of the royal dynasty of Gwynedd., Prestatyn is a seaside resort, town and community in Denbighshire, Wales. Historically a part of Flintshire, it is located on the Irish Sea coast, to the east of Rhuddlan. At the 2001 Census, Prestatyn had a population of 18,496, increasing to 18,849 at the 2011 census., Deheubarth (lit. "Right-hand Part", thus "the South") was a regional name for the realms of south Wales, particularly as opposed to Gwynedd (Latin: "Venedotia"). 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" ("the Southern Britons") and not as a named land. In the oldest British writers, "Deheubarth" was used for "all" of modern Wales to distinguish it from "Y Gogledd" or "Hen Ogledd", the northern lands whence Cunedda and the Cymry originated., Seisyllwg was a petty kingdom of medieval Wales. It is unclear when it emerged as a distinct unit, but according to later sources it consisted of the former Kingdom of Ceredigion plus the region known as Ystrad Tywi. Thus it covered the modern county of Ceredigion, part of Carmarthenshire, and the Gower Peninsula. It is evidently named after Seisyll, king of Ceridigion in the 7th or early 8th century, but it is unknown if he was directly responsible for its establishment. In the 10th century Seisyllwg became the center of power for Hywel Dda, who came to rule most of Wales. In 920 Hywel merged Seisyllwg with the Kingdom of Dyfed to form the new kingdom of Deheubarth., Hywel Dda ( English : Hywel the Good ) or Hywel ap Cadell ( c.880 -- 950 ) was a King of Deheubarth who 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 Cambriae and the Annals of Ulster . Hywel is highly esteemed among other medieval Welsh rulers . His name is particularly linked with the codification of traditional Welsh law , which were thenceforth known as the Laws of Hywel Dda . The latter part of his name ( Dda , lit. `` Good '' ) refers to the fact that his laws were just and good . The historian Dafydd Jenkins sees in them compassion rather than punishment , plenty of common sense and recognition of the rights of women . Hywel Dda was a well - educated man even by modern standards , having a good knowledge of Welsh , Latin , and English . The office building and original home of the National Assembly for Wales is named T Hywel ( `` Hywel House '' or `` Hywel 's House '' ) in honour of Hywel Dda . The original Assembly chamber , now known as Siambr Hywel ( `` Hywel 's Chamber '' ) , is used for educational courses and for children and young people 's debates . The local health board of south - west Wales also bears his name ., Ceredigion is a county in Mid Wales. In the Middle Ages, it was a minor kingdom also known for a time as Seisyllwg. Following its Norman conquest, the name was anglicised to Cardigan and then Cardiganshire and it began to be administered as a county in 1282. The county had a population of 75,900 at the 2011 UK census. Its largest town, Aberystwyth, is one of the two administrative centres; the other being Aberaeron. Aberystwyth houses Aberystwyth University, Bronglais Hospital and the National Library of Wales. The inland town of Lampeter houses part of the University of Wales Trinity Saint David. More than half the population speak the Welsh language and the county is considered a centre of Welsh culture., Annales Cambriae (Latin for The Annals of Wales) is the name given to a complex of Cambro-Latin chronicles compiled or derived from diverse sources at St David's in Dyfed, Wales. The earliest is a 12th-century presumed copy of a mid-10th century original; later editions were compiled in the 13th century. Despite the name, the "Annales Cambriae" record not only events in Wales, but also events in Ireland, Cornwall, England, Scotland and sometimes further afield, though the focus of the events recorded especially in the later two-thirds of the text is Wales., The House of Dinefwr was a royal house of Wales and refers to the descendants of Cadell ap Rhodri King of Seisyllwg, son of Rhodri the Great., The Irish Sea (, , , Ulster-Scots: "Airish Sea"), separates the islands of Ireland and Great Britain. It is connected to the Celtic Sea in the south by St George's Channel, and to the Inner Seas off the West Coast of Scotland in the north by the North Channel. Anglesey is the largest island within the Irish Sea, followed by the Isle of Man. The sea is occasionally, but rarely, referred to as the Manx Sea., Ireland (Ulster-Scots: ) is an island in the North Atlantic. It is separated from Great Britain to its east by the North Channel, the Irish Sea, and St George's Channel. Ireland is the second-largest island of the British Isles, the third-largest in Europe, and the twentieth-largest on Earth., Subject: hywel dda, Relation: father, Options: (A) cadell ap rhodri (B) cunedda (C) david (D) george
Output: cadell ap rhodri