Mabon ap Modron is a prominent figure from Welsh and wider Brythonic literature and mythology, the son of Modron and a member of Arthur's war band. Both he and his mother were likely deities in origin, descending from a divine mother–son pair. He is often equated with the Demetian hero Pryderi fab Pwyll, and may be associated with the minor Arthurian character Mabon ab Mellt.
Manawydan fab Llŷr is a figure of Welsh mythology, the son of Llŷr and the brother of Brân the Blessed and Brânwen. The first element in his name is cognate with the stem of the name of the Irish sea god Manannán mac Lir, and likely originated from the same Celtic deity as Manannán. Unlike Manannán, however, no surviving material connects him with the sea in any way except for his patronymic. Manawydan's most important appearances occur in the Second and Third Branches of the Mabinogi, but he is also referenced frequently in medieval poetry and the Welsh Triads.
In Welsh mythology, Amaethon was the god of agriculture, and the son of the goddess Dôn and Beli Mawr, and brother to Arianrhod, Penarddun, Gilfaethwy, Gofannon, Gwydion, and Nudd. His name means "labourer" or "ploughman", and he is cited as being responsible for the Cad Goddeu, or "Battle of Trees", between the lord of the otherworld, Arawn, and the Children of Dôn.
Arianrhod is a figure in Welsh mythology who plays her most important role in the Fourth Branch of the Mabinogi. She is the daughter of Dôn and the sister of Gwydion and Gilfaethwy; the Welsh Triads give her father as Beli Mawr. In the Mabinogi her uncle Math ap Mathonwy is the King of Gwynedd, and during the course of the story she gives birth to two sons, Dylan ail Don and Lleu Llaw Gyffes, through magical means.
Gofannon is a Middle Welsh reflex of Gobannus, one of the deities worshipped by the ancient Celts. He features in Middle Welsh literature as a great metal worker and as the son of Dôn. His name can be compared with the Old Irish gobae ‘smith’, Middle Welsh / Cornish / Breton gof ‘smith’, Gaulish gobedbi ‘with the smiths’, all of which are cognate with Lithuanian gabija ‘sacred home fire’, gabus ‘gifted, clever’. His apparent counterpart in Irish mythology, Goibniu, in addition to his duties as a smith, also takes on the role of a divine hero who brewed an ale of immortality, in addition to being an architect and builder.
Gwyn ap Nudd is a Welsh mythological figure, the king of the Tylwyth Teg or "fair folk" and ruler of the Welsh Otherworld, Annwn, and whose name means “Gwyn, son of Nudd”. Described later on as a great warrior with a "blackened face", Gwyn is intimately associated with the otherworld in medieval Welsh literature, and is associated with the international tradition of the Wild Hunt.
In Welsh mythology, Arawn was the king of the otherworld realm of Annwn who appears prominently in the first branch of the Mabinogi, and alluded to in the fourth. In later tradition, the role of the king of Annwn was largely attributed to the Welsh psychopomp, Gwyn ap Nudd - meaning "white" a possible kenning for his true name. However, Arawn's memory is retained in a traditional saying found in an old Cardigan folktale:
Rhiannon is a major figure in Welsh mythology, appearing in the First Branch of the Mabinogi, and again in the Third Branch. Ronald Hutton called her "one of the great female personalities in World literature", adding that "there is in fact, nobody quite like her in previous human literature". In the Mabinogi, Rhiannon is a strong-minded Otherworld woman, who chooses Pwyll, prince of Dyfed, as her consort, in preference to another man to whom she has already been betrothed. She is intelligent, politically strategic, beautiful, and famed for her wealth and generosity. With Pwyll she has a son, the hero Pryderi, who later inherits the lordship of Dyfed. She endures tragedy when her newborn child is abducted, and she is accused of infanticide. As a widow she marries Manawydan of the British royal family, and has further adventures involving enchantments.
In Celtic mythology, Dea Matrona was the goddess who gives her name to the river Marne in Gaul.
In ancient Celtic religion, Maponos or Maponus is a god of youth known mainly in northern Britain but also in Gaul. In Roman Britain, he was equated with Apollo.
Culhwch and Olwen is a Welsh tale that survives in only two manuscripts about a hero connected with Arthur and his warriors: a complete version in the Red Book of Hergest, c. 1400, and a fragmented version in the White Book of Rhydderch, c. 1325. It is the longest of the surviving Welsh prose tales. Lady Charlotte Guest included this tale among those she collected under the title The Mabinogion.
Welsh mythology consists of both folk traditions developed in Wales, and traditions developed by the Celtic Britons elsewhere before the end of the first millennium. As in most of the predominantly oral societies Celtic mythology and history were recorded orally by specialists such as druids. This oral record has been lost or altered as a result of outside contact and invasion over the years. Much of this altered mythology and history is preserved in medieval Welsh manuscripts, which include the Red Book of Hergest, the White Book of Rhydderch, the Book of Aneirin and the Book of Taliesin. Other works connected to Welsh mythology include the ninth-century Latin historical compilation Historia Brittonum and Geoffrey of Monmouth's twelfth-century Latin chronicle Historia Regum Britanniae, as well as later folklore, such as the materials collected in The Welsh Fairy Book by William Jenkyn Thomas (1908).
Morfydd ferch Urien is a figure of Welsh Arthurian legend. She is the daughter of Urien Rheged by Modron, and twin sister to Owain. Morfydd appears in the Welsh Triads and is also referred to in Culhwch and Olwen. The enduring love between her and Cynon son of Clydno, one of Arthur's warriors, is remarked on in several of the Triads, pointing to a now-lost popular tradition.
Gwenhwyfach was a sister of Gwenhwyfar (Guinevere) in medieval Welsh Arthurian legend. The tradition surrounding her is preserved in fragmentary form in two Welsh Triads and the Mabinogi tale of Culhwch and Olwen.
Preiddeu Annwfn or Preiddeu Annwn is a cryptic poem of sixty lines in Middle Welsh, found in the Book of Taliesin. The text recounts an expedition with King Arthur to Annwfn or Annwn, the Otherworld in Welsh.
Llŷr is a figure in Welsh mythology, probably originally a deity, probably derived from Irish Ler, father of Manannán mac Lir. Other than his progeny and odd tidbits, his identity remains obscure.
Celtic mythology is the body of myths belonging to the Celtic peoples. Like other Iron Age Europeans, Celtic peoples followed a polytheistic religion, having many gods and goddesses. The mythologies of continental Celtic peoples, such as the Gauls and Celtiberians, did not survive their conquest by the Roman Empire, the loss of their Celtic languages and their subsequent conversion to Christianity. Only remnants are found in Greco-Roman sources and archaeology. Most surviving Celtic mythology belongs to the Insular Celtic peoples. They preserved some of their myths in oral lore, which were eventually written down by Christian scribes in the Middle Ages. Irish mythology has the largest written body of myths, followed by Welsh mythology.
In the earliest prose stories in Britain in the Mabinogi, the Adar Rhiannon; "birds of Rhiannon", are specifically three magical birds, whose song can "wake the dead and lull the living to sleep". They also have a non-rational effect on space as they can be remote but seem very near. They are connected with Rhiannon the Queen of Dyfed who is thought to be a British euhemerized horse goddess, so part of Welsh mythology. The Adar Rhiannon were demanded by the giant Ysbaddaden Bencawr as a marriage task for Culhwch to complete. The giant wanted the Birds to soothe him as he faced his last night of life, prophesied as the consequence of his daughter's wedding.
Poem 31 of the Black Book of Carmarthen, a mid-13th century manuscript, is known from its first line as Pa gur yv y porthaur? or Pa gur, or alternatively as Ymddiddan Arthur a Glewlwyd Gafaelfawr. It is a fragmentary, anonymous poem in Old Welsh, taking the form of a dialogue between King Arthur and the gatekeeper Glewlwyd Gafaelfawr, in which Arthur boasts of his own exploits and those of his companions, especially Cai the Fair. Pa gur is notable for being one of the earliest vernacular Arthurian works, and for alluding to several early adventures of Arthur which are now lost. Its precise age is not known and has been the subject of wide-ranging disagreement, but scholarly opinion now tends to favour a date of c. 1100.
