Celtic Folklore

Celtic folklore is the body of traditional belief, story, and ritual that arose among the Celtic-speaking peoples of the Atlantic fringe of Europe. It encompasses the traditions of Ireland, Scotland, Wales, Cornwall, the Isle of Man, and Brittany, and it carries with it a recognisable shape: a deep reverence for the land, a rich and often ambiguous relationship with the Good Neighbours (the fae), a heroic tradition of warriors and poets, and a sense that the otherworld is never very far away.

This page is part of the wider survey of European Folklore. Within it, two further articles focus in more detail on specific Celtic topics: the fairy forts of Ireland and the Welsh dragon legends.

The Celtic World

The term “Celtic” describes a family of cultures and languages that once stretched across much of central and western Europe. By the early medieval period the Celtic-speaking peoples had been pushed to the western and northern edges of the continent by the expansion of Rome, the Germanic migrations, and later the Anglo-Saxon and Frankish settlements. The result is the cultural map we know today: Irish and Scottish Gaelic, Welsh, Cornish, Breton, and the now-extinct Manx.

Despite political differences, the folk traditions of these regions share a great deal. Stories of the Tuatha Dé Danann in Ireland have cousins in the Tylwyth Teg and the Plant Rhys (the fairy children of the lake of Craig-y-nos) of Wales. The selkies of the Scottish and Irish coasts echo the sea-fairies of Breton legend. Festivals such as Samhain, Beltane, Imbolc, and Lughnasadh were observed across the Celtic world and survive in altered form to this day.

The Good Neighbours

Central to Celtic folklore is the idea that the land is shared with another people. In Ireland they are called the Daoine Sí, the “people of the fairy mounds”. In Scotland, the Good Neighbours or the Sìth. In Wales, the Tylwyth Teg. The names differ, but the character is consistent: a parallel race, often small, beautiful, and dangerous, who live under the hills, in the lakes, or in the hollows of old trees.

These beings are not the sweet fairies of later English children’s tales. They are morally ambiguous, sometimes helpful and sometimes deadly. A farmer who disturbs a fairy fort may have his crops blighted. A bride who dances too long at a fairy gathering may return after what seems like a single night to find that a hundred years have passed. The message is clear: respect the old places.

The relationship with these beings is governed by careful custom. Iron is dangerous to them. Certain days and times — May Day, Midsummer, Samhain night — are times when the veil is thin. Bread and milk left on the windowsill, or a share of the harvest left in the field, can keep them content.

The Fairy Races

Across the Celtic world, folk tradition distinguishes several classes of fairy. In Ireland, the Daoine Sí of the mounds are the most ancient. Above them, in some accounts, stand the Sluagh Sí, the host of the dead who ride out on Samhain night. Below them, in lakes and pools, live the Merrows and Muirgheilt — sea fairies, often green-haired and melancholy. In Scotland, the Brownie is a household spirit who works for a bowl of cream; the Banshee is a solitary keener whose cry foretells a death. The Welsh Tylwyth Teg and the Cornish Spriggans and Piskies are local names for what is recognisably the same family of beings. The names change, but the structure — a hierarchy of spirits, a moral code of respect, a calendar of danger — holds good from Cape Clear to Cape Wrath.

The Otherworld

A recurring idea in Celtic folklore is the Otherworld, a parallel land that is in some way more real than our own. In Irish myth it is reached through burial mounds, lakes, or westward voyages. The Tír na nÓg, the “Land of the Young”, is a country of eternal youth where the dead feast and play music. In Welsh tradition Annwn is a similar land, ruled by Arawn, and is the destination of the great legendary hero Pwyll of the Mabinogion, who later becomes its king.

The Otherworld is not simply heaven or hell in the Christian sense. It is a place of strange geography, where time passes differently and where a mortal must be careful what he eats and drinks. The famous tale of Bran mac Febail, the “Voyage of Bran”, describes a journey across the sea to an island of women — a story whose structural parallels with the later Navigatio Sancti Brendani (the Voyage of St Brendan) and with the Grail romances have been one of the mainstays of Celtic scholarship since the nineteenth century.

Tír na nÓg and the Immortals

The most beloved of the Irish otherworlds is Tír na nÓg, the Land of the Young. It is said to lie far to the west, beyond the ninth wave, and there time passes without aging. The hero Oisín, son of Fionn mac Cumhaill, lives there for what seems a few years with the fairy woman Niamh of the Golden Hair, and then returns to Ireland to find that three hundred years have gone by. The tale, in various forms, is told across the Celtic world, and it carries the same moral wherever it goes: the mortal who tastes the food of the fairy folk is lost to the world of the living, and even a moment of fairy time is a lifetime of human time.

Heroes, Kings, and Poets

Celtic folklore is rich in heroes. The Fianna of Ireland, the war-band of Fionn mac Cumhaill, are remembered in the Acallam na Senórach and in the ballads of the eighteenth and nineteenth centuries. Fionn’s lover Gráinne and his loyal hound Bran are as familiar in Irish tradition as Robin Hood is in English. In Wales, the kings of the Mabinogion move between this world and Annwn with ease.

Celtic society gave the poet a sacred role. The Irish filidh were not merely entertainers but masters of a power that could bless or curse. Their Welsh counterparts, the bards, were similarly respected and feared. A satire from a true poet could raise boils on the skin of a king. The bardic tradition is part of a wider European heritage of oral storytelling that also includes the Norse skalds and the West African griots.

The Fianna and the Fenian Cycle

The Fianna of Irish tradition are a kind of standing army of heroes in the service of the High King. Their leader, Fionn mac Cumhaill, is a figure of many parts: warrior, poet, seer. He gains his wisdom by touching his thumb to the tooth of the Salmon of Knowledge, who has eaten the nuts of the nine hazels of wisdom that grow over the well of wisdom in the river Boyne. His war-band includes the mighty Diarmuid Ua Duibhne, who is loved by Fionn’s betrothed Gráinne and whose flight with her is one of the great love stories of the tradition. The Fenian cycle, preserved in the Acallam na Senórach and in later ballads, is the most popular body of Irish narrative outside the great mythological cycles of the gods.

Sacred Places

The landscape of the Celtic world is dense with sacred sites. There are the ringforts of Ireland, the brochs of Scotland, the hill forts of Wales, the standing stones of Brittany. Many of these were Christianised in the early medieval period — the stones became saints’ beds, the wells became holy wells — but the older sense of place rarely disappears entirely. A fairy fort is at the same time an archaeological monument, a place of folk memory, and a working holy site for those who still leave offerings.

Holy Wells

Almost every parish in Ireland, Wales, and Brittany has its holy well, and many of these have preserved an older character beneath their Christian dress. The pattern of veneration — walking sunwise around the well, leaving a clootie (a strip of cloth) on a tree, drinking the water, or bathing a sore limb in it — has a recognisably pre-Christian shape. The pattern days, on which these wells are visited, often fall on the old quarter-days of the Celtic calendar: Bealtaine, Lúnasa, Samhain, Imbolg. The well of St Brigid at Kildare, the well of St Columba at Gartan, the wells of the saints in the Breton villages of the Monts d’Arrée — all carry the imprint of an older cult of the water.

Sea, Lake, and River Beings

The Celtic coast is home to a rich family of sea beings. The selkies of the Hebrides and the northern isles are seals that can shed their skin and walk on land as beautiful men or women; to steal a selkie skin is to bind its owner to the human world. The mermaids of the Breton and Cornish coasts, the Ceasg of the Scottish Highlands, the Moruadh of the Irish sea — all are part of the wider European tradition of the mermaid, but they carry a specifically Celtic colouring. Inland, the lochs of the Highlands are the home of the Kelpie, and the lakes of Ireland hold the lurker and the lake-dweller — beings that may be seen but should not be approached.

Survivals into Modern Times

Celtic folklore is not a closed book. It lives on in Irish-language communities of the west of Ireland, in the Welsh-speaking heartlands, in the Breton cultural festivals, and in the Scottish Highlands and Islands. It also lives on in the global Irish and Welsh diasporas, in the form of music, dance, and storytelling. The Celtic Revival of the late nineteenth and early twentieth centuries — the work of figures like W. B. Yeats, Lady Gregory, and the Welsh poet Dylan Thomas — re-introduced these older stories to a wider audience and continues to inspire writers, musicians, and filmmakers today.

The Celtic Revival

The late nineteenth and early twentieth centuries saw an extraordinary flowering of interest in Celtic tradition. In Ireland, Yeats, Lady Gregory, John M. Synge, and Douglas Hyde drew on the old stories to build a new national literature. In Wales, the eisteddfod tradition, with its bardic chair, its chairing of the bard, and its competitions in poetry, brought medieval custom into the industrial present. In Scotland, the collecting work of figures like Sorley MacLean and the school of Gaelic revival kept the older songs and stories alive. In Brittany, the Gorsedd of the bards, modelled on the Welsh institution, gathered writers and musicians into a Celtic fraternity. The result is a continuous tradition, stretching from the medieval manuscripts to the present day, and it is one of the great cultural achievements of the Atlantic fringe.

In this section

Irish Fairy Forts

Welsh Dragons Legend