Maelgwn Gwynedd was king of Gwynedd during the early 6th century. Surviving records suggest he held a pre-eminent position among the Brythonic kings in Wales and their allies in the "Old North" along the Scottish coast. Maelgwn was a generous supporter of Christianity, funding the foundation of churches throughout Wales and even far beyond the bounds of his own kingdom. Nonetheless, his principal legacy today is the scathing account of his behavior recorded in De Excidio et Conquestu Britanniae by Gildas, who considered Maelgwn a usurper and reprobate. The son of Cadwallon Lawhir and great-grandson of Cunedda, Maelgwn was buried on Ynys Seiriol, off the eastern tip of Anglesey, having died of the "yellow plague"; quite probably the arrival of Justinian's Plague in Britain.
Esus, Esos, Hesus, or Aisus was a Brittonic and Gaulish god known from two monumental statues and a line in Lucan's Bellum civile.
The Afanc is a lake monster from Welsh mythology. Its exact description varies; it is described variously as resembling a crocodile, beaver or dwarf-like creature, or a platypus and is sometimes said to be a demon. The lake in which it dwells also varies; it is variously said to live in Llyn Llion, Llyn Barfog, near Brynberian Bridge or in Llyn yr Afanc, a lake near Betws-y-coed that was named after the creature.
The Welsh Triads are a group of related texts in medieval manuscripts which preserve fragments of Welsh folklore, mythology and traditional history in groups of three. The triad is a rhetorical form whereby objects are grouped together in threes, with a heading indicating the point of likeness; for example, "Three things not easily restrained, the flow of a torrent, the flight of an arrow, and the tongue of a fool."
Edward Williams, better known by his bardic name Iolo Morganwg, was a Welsh antiquarian, poet and collector. He was seen as an expert collector of Medieval Welsh literature, but it emerged after his death that he had forged several manuscripts, notably some of the Third Series of Welsh Triads. Even so, he had a lasting impact on Welsh culture, notably in founding the secret society known as the Gorsedd, through which Iolo Morganwg successfully co-opted the 18th-century Eisteddfod revival. The philosophy he spread in his forgeries has had an enormous impact upon neo-Druidism. His bardic name is Welsh for "Iolo of Glamorgan".
Rhun ap Maelgwn Gwynedd, also known as Rhun Hir ap Maelgwn Gwynedd, sometimes spelt as 'Rhûn', was King of Gwynedd. He came to the throne on the death of his father, King Maelgwn Gwynedd. There are no historical records of his reign in this early age. A story preserved in both the Venedotian Code and an elegy by Taliesin says that he waged a war against Rhydderch Hael of Alt Clut and the kings of Gododdin or Manaw Gododdin. The small scattered settlement of Caerhun in the Conwy valley is said to be named for him, though without strong authority. Rhun also appears in several medieval literary stories, as well as in the Welsh Triads. His wife was Perwyr ferch Rhûn "Ryfeddfawr" and their son was Beli ap Rhun "Hîr".
Iolo Goch was a medieval Welsh bard who composed poems addressed to Owain Glyndŵr, among others.
Yr Hen Ogledd, or in English the Old North, is the historical region that was inhabited by the Brittonic people of sub-Roman Britain in the Early Middle Ages, now Northern England and the southern Scottish Lowlands, alongside the Celtic Kingdom of Elmet. Its population spoke a variety of the Brittonic language known as Cumbric which is closely related to, if not a dialect of Old Welsh. The people of Wales and the Hen Ogledd considered themselves to be one people, and both were referred to as Cymry ('fellow-countrymen') from the Brittonic word combrogi. The Hen Ogledd was distinct from the parts of North Britain inhabited by the Picts, Anglo-Saxons, and Scoti.
Le Pèlerinage de Charlemagne is an Old French chanson de geste dealing with a fictional expedition by Charlemagne and his paladins. The oldest known written version was probably composed around 1140. Two 15th-century reworkings of the story are also known.
Celliwig, Kelliwic or Gelliwic is perhaps the earliest named location for the court of King Arthur. It may be translated as 'forest grove'.
Côr Tewdws or Bangor Tewdws is a fictional Romano-British ecclesiastical college that in the 18th and 19th centuries was understood to have been the predecessor of the historically attested 6th century College and Abbey of Saint Illtud at what is now Llantwit Major in Glamorgan in Wales. The supposed Roman college is believed to have been invented by the historian of ill-repute, Edward Williams, more generally known as Iolo Morganwg.
The Coraniaid are a race of beings from Welsh mythology. They appear in the Middle Welsh prose tale Lludd and Llefelys, which survives in the Mabinogion and inserted into several texts of the Brut y Brenhinedd, a Welsh adaptation of Geoffrey of Monmouth's Historia Regum Britanniae. The Coraniaid figure in the tale as one of three plagues that affect Britain during the reign of King Lludd. They are characterized by a sense of hearing so acute that they can hear any word the wind touches, making action against them impossible.
Jean Le Fustec was a Breton bard, and the first Archdruid of the Goursez Vreizh. He is also known by his Breton language name Yann ab Gwilherm and his Druidic name Lemenik.
Gwyddyl Ffichti is a term that appears in the third series of Welsh Triads, apparently referring to the Picts. It was central to William Forbes Skene's argument that the Picts were a Goidelic, Celtic-speaking people and that their language was ancestral to modern Scottish Gaelic. The passage in which it appears is believed to be an invention of the 18th/19th century Welsh Antiquarian Iolo Morganwg. The suspicion of Morganwg's forgery was first raised by Skene himself in 1868:
It is a peculiarity attaching to almost all of the documents which have emanated from the chair of Glamorgan, in other words, from Iolo Morganwg, that they are not to be found in any of the Welsh MSS. contained in other collections, and that they must be accepted on his authority alone. It is not unreasonable, therefore, to say that they must be viewed with some suspicion, and that very careful discrimination is required in the use of them.
Barddas is a book of material compiled and written by the Welsh writer Iolo Morganwg. Dressed as an authentic compilation of ancient Welsh bardic and druidic theology and lore, its contents are largely Iolo's invention. It was posthumously published by John Williams for the Welsh Manuscripts Society in two volumes, in 1862 and 1874.
Dwyfan and Dwyfach, sometimes also called Dwyvan and Dwyvach, in Welsh mythology feature in a flood legend from the Welsh Triads. The Afanc, a monster that lived in Llyn Llion caused a huge flood. Dwyfan and Dwyfach were the sole human survivors, escaping in a mastless boat. They constructed a ark-like vessel named Nefyd Naf Neifion, which was to carry a pair of each species. Thus Prydain (Britain) was re-populated by this pair. Comparisons have been made with Noah and Deucalion. The figure Dwyfach is identified with the small Dwyfach river of Gwynedd entering Cardigan Bay near Porthmadog, whilst Dwyfan is identified with the river it enters, the Dwyfawr or Dwyfor.
"Lament for Lleucu Llwyd" is a Middle Welsh poem by the 14th-century bard Llywelyn Goch ap Meurig Hen in the form of a cywydd. It is his most famous work, and has been called one of the finest of all cywyddau and one of the greatest of all Welsh-language love-poems, comparable with the best poems of Dafydd ap Gwilym. The culmination of a series of poems addressed to his lover Lleucu Llwyd, a married woman, it differs from them in calling her forth from her grave as if he were a more conventional lover serenading her as she lies in bed. The effect is said to be "startling, original, but in no way grotesque". "Lament for Lleucu Llwyd" was included in both The Oxford Book of Welsh Verse and The Oxford Book of Welsh Verse in English.
"Y Llafurwr", known in English as "The Ploughman" or "The Labourer", is a poem in the form of a cywydd by the 14th-century Welsh poet Iolo Goch. Often compared with William Langland's Middle English Piers Plowman, it presents a sympathetic portrayal of the meek and godly ploughman; no other Welsh bardic poem takes an ordinary working man as its subject. It has been called the most notable of Iolo's poems, comparable with the finest works of Dafydd ap Gwilym, and its popularity in the Middle Ages can be judged from the fact that it survives in seventy-five manuscripts. It is included in The Oxford Book of Welsh Verse.
The March Malaen is cited in Celtic folklore as an evil horse associated with the Devil and witchcraft, whose mythical or historical origins remain obscure. In the 18th century, its tradition was said to be widespread among the Welsh, through a popular expression and the Gallic goddess Andarta.
