Celtic names carry something most modern names simply don’t: a direct line back to the ancient peoples of Ireland, Scotland, Wales, Brittany, and the Isle of Man. These are names forged from the natural world, warrior culture, and mythology, words that meant “sea,” “fire,” “battle chief,” or “bright one” to people who lived and died by those things. If you’re drawn to names with genuine roots and a sound that feels both ancient and alive, Celtic names are worth your serious attention.
What makes a name truly Celtic? Linguists trace Celtic languages through two main branches: Goidelic (Irish, Scottish Gaelic, Manx) and Brythonic (Welsh, Cornish, Breton). The names below come from these traditions, not Anglicized approximations invented in the 19th century, but names with real documented use and genuine etymological roots.
Classic Irish Celtic Boys’ Names
Irish Gaelic has produced some of the most recognizable Celtic names in the world, and these carry the full weight of that tradition.
Ciarán
From the Old Irish word ciarmeaning “dark” or “black,” this name was borne by multiple early Irish saints. It’s been in continuous use in Ireland for over a millennium and has a quiet, grounded confidence to it.
Fergus
A name of Old Irish and Scottish Gaelic origin meaning “man of vigor” or “strong man,” from fear (man) and gus (vigor, strength). Fergus mac Róich is one of the great heroes of Irish mythology, which gives this name serious storytelling weight.
Cormac
Meaning “charioteer” or possibly “son of the raven” in Old Irish, Cormac has been a kingly name in Ireland since antiquity. Cormac mac Airt, the legendary High King of Ireland, is its most famous bearer.
Oisín
Pronounced “uh-SHEEN,” this name means “little deer” in Irish Gaelic, from os (deer). In mythology, Oisín was the son of the hero Fionn mac Cumhaill and a poet of the Fianna. It’s a name with genuine lyrical beauty.
Eógan
An Old Irish name meaning “born of the yew” or related to a Proto-Celtic root meaning “born of” combined with a word for yew tree. It’s an ancestor of the anglicized Owen and the Scottish Ewen, and feels more distinctly Celtic in its original form.
Lugh
In Irish mythology, Lugh is the sun god and master of all skills, his name possibly derived from a Proto-Celtic root meaning “light” or “brightness.” Short, strong, and mythologically loaded, this one is criminally underused.
Conall
From Old Irish con (hound, warrior) and all (great, mighty), meaning “strong wolf” or “great warrior.” Multiple Ulster Cycle heroes bear this name, and it has never fully left use in Ireland and Scotland.
Tadhg
Pronounced “TYE-g,” this name means “poet” or “philosopher” in Irish Gaelic. It was one of the most common men’s names in medieval Ireland and is seeing a strong revival today. The anglicized form Teague doesn’t do it justice.
Lorcan
Meaning “little fierce one” in Irish, from lorc (fierce, cruel) with a diminutive suffix. It was the birth name of St. Laurence O’Toole, the patron saint of Dublin, and has a fierceness and charm that the anglicized Laurence entirely lacks.
Fionn
Simply meaning “fair,” “white,” or “bright” in Irish Gaelic. Fionn mac Cumhaill is the legendary leader of the Fianna warriors and one of the great figures of Irish mythology. Short, clear, and unmistakably Celtic.
Classic Irish Celtic Girls’ Names
Irish women’s names have a particular music to them, vowel-heavy, flowing, and full of meaning drawn from light, nature, and mythology.
Aoife
Pronounced “EE-feh,” this name is generally understood to mean “beautiful” or “radiant” in Irish Gaelic. In mythology, Aoife is a fierce warrior queen and one of the most compelling female figures in the Ulster Cycle.
Saoirse
Pronounced “SEER-sha,” this name means “freedom” or “liberty” in Irish. It emerged as a given name in the 20th century during the Irish independence movement, making it a name with genuine political and cultural resonance.
Brigid
From Old Irish bríghmeaning “power,” “strength,” or “virtue.” Brigid was a major goddess of the pre-Christian Irish, and St. Brigid of Kildare is one of Ireland’s patron saints. Few names carry this much dual heritage.
Niamh
Pronounced “NEEV,” this name means “bright” or “radiant” in Irish Gaelic. Niamh of the Golden Hair is a figure from the Fenian Cycle, the daughter of the sea god Manannán mac Lir. It’s been a consistently popular name in Ireland for decades.
Clíodhna
Pronounced roughly “KLEE-na,” Clíodhna is a figure from Irish mythology described as the most beautiful woman in the world, a queen of the Irish fairies. The etymology is debated, but the name has been in use in Ireland since ancient times.
Étaín
Pronounced “AY-deen,” this name’s origin is debated but it may be connected to an Old Irish word meaning “jealousy” or possibly related to a word for “fire.” Étaín is the heroine of one of the oldest and most beautiful Irish mythological tales.
Caoimhe
Pronounced “KEE-va” or “KWEE-va,” this name comes from the Old Irish word caomhmeaning “gentle,” “beautiful,” or “precious.” It’s been popular in Ireland and is gaining traction among parents who love Celtic names internationally.
Muireann
Pronounced “MWIR-an,” this name means “sea-white” or “sea-fair” in Irish, from muir (sea) and fionn (fair, white). It belongs firmly to the world of Irish mythology and is one of those names that sounds as old as the Atlantic.
Sorcha
Pronounced “SUR-a-ha” or “SOR-uh-ha,” this Irish Gaelic name means “brightness” or “radiance.” It’s the Irish equivalent of the concept behind Clara or Lucy but sounds nothing like either, which is exactly the appeal.
Aisling
Pronounced “ASH-ling,” this name means “dream” or “vision” in Irish Gaelic. An aisling is also a specific genre of Irish poetry in which Ireland appears to the poet as a woman, giving this name extraordinary literary and national depth.
Scottish Gaelic Celtic Names for Boys
Scottish Gaelic developed its own naming traditions distinct from Irish, with a particular emphasis on clan identity, landscape, and the warrior ideal.
Alasdair
The Scottish Gaelic form of Alexander, meaning “defender of men.” It entered Scottish Gaelic culture centuries ago and has been thoroughly absorbed into the tradition. The anglicization Alistair is well known, but Alasdair is the real thing.
Coinneach
Pronounced “KON-yach,” this is the Scottish Gaelic form of the name usually anglicized as Kenneth, meaning “handsome” or “fair one.” The famous Brahan Seer, a legendary Scottish prophet, bore this name.
Ruaraidh
Pronounced “ROO-ree” or “ROO-a-ree,” this Scottish Gaelic name means “red king” or “red ruler,” from Proto-Celtic roots meaning “red” and “king.” It’s the source of the anglicized Rory and is far more distinctive in its original form.
Dòmhnall
Pronounced “DOH-nal” in Scottish Gaelic, this is the original form behind Donald, meaning “ruler of the world” from Celtic dubno (world) and val (rule). A proper clan name with centuries of Highland history behind it.
Seumas
The Scottish Gaelic form of James, pronounced “SHAY-mus.” It’s cognate with the Irish Séamas and both trace back through Latin Jacobus to the Hebrew Yaakov. In a Scottish Gaelic context, it’s as traditional as it gets.
Fearchar
Pronounced “FER-a-har,” this Scottish Gaelic name means “dear man” or “very dear one,” from fear (man) and car (dear, beloved). It was the name of several early Scottish kings and remains one of the most distinctive names in the Gaelic tradition.
Scottish Gaelic Celtic Names for Girls
Scottish Gaelic women’s names have a different texture from Irish ones, often harder-edged, shaped by the landscape of the Highlands.
Mòr
Simply meaning “great” or “large” in Scottish Gaelic, Mòr was one of the most common women’s names in medieval Scotland. Short, strong, and genuinely ancient, it has the confidence of a name that needs no explanation.
Fionnuala
Shared between Irish and Scottish Gaelic tradition, this name means “white shoulder” or “fair shoulder,” from fionn (fair, white) and guala (shoulder). In Irish mythology, Fionnuala was one of the Children of Lir, transformed into a swan.
Beathag
Pronounced “BEH-ak,” this Scottish Gaelic name is related to the word beathameaning “life.” It’s sometimes anglicized as Bethia or Sophia, though neither captures the original. Genuinely rare and genuinely Celtic.
Mairead
The Scottish Gaelic (and Irish) form of Margaret, meaning “pearl.” Pronounced “mah-RAYD,” it has been in continuous use in Scotland for centuries and feels much more rooted than its international equivalents.
Sìleas
Pronounced “SHEE-las,” this is the Scottish Gaelic form of Julia or Cecilia, long naturalized into Highland naming tradition. The 18th-century Gaelic poet Sìleas na Ceapaich bore this name, giving it a strong literary connection.
Welsh Celtic Names for Boys
Welsh names come from the Brythonic branch of Celtic languages and have a completely different sound from their Goidelic cousins, full of double-ls, ws used as vowels, and a distinct musicality.
Emrys
A Welsh name derived from the Latin Ambrosiosmeaning “immortal” or “divine.” In Arthurian legend, Merlin’s other name is Myrddin Emrys, and the name has been in Welsh use since the early medieval period.
Caradoc
The Welsh form of Caratācos, a Brythonic Celtic name meaning “beloved” or possibly “amiable.” The historical Caratacus was a British chieftain who resisted Roman conquest in the 1st century AD. It’s bold and unmistakably Celtic.
Gwydion
From Welsh mythology, Gwydion is a powerful magician and hero in the Mabinogion, the great collection of Welsh myths. The name’s etymology connects to an old Celtic root meaning “born of trees” or related to a word for “god-like.” Rare, striking, and deeply Welsh.
Rhodri
A Welsh name meaning “wheel king” or “ruler of the wheel,” from rhod (wheel) and rhi (king, ruler). Rhodri Mawr (Rhodri the Great) was a 9th-century King of Gwynedd. It’s been in consistent Welsh use ever since.
Llywelyn
Pronounced “hluh-WEL-in,” this Welsh name is possibly connected to an old Celtic word meaning “leader” or “lion-like.” Llywelyn ap Gruffudd was the last native Prince of Wales, making this one of the most historically charged names on this list.
Owain
The Welsh form of a name derived from the Latin Eugenius, meaning “well-born,” though in Welsh tradition it carries its own mythological weight through figures like Owain of the Arthurian legends. It’s been a top Welsh name for centuries.
Bran
Simply meaning “raven” in Welsh and other Celtic languages. Bran the Blessed is a giant-king figure in Welsh mythology whose severed head continued to speak and prophecy. Short, dark, and mythologically potent.
Cai
The original Welsh form of Kay, one of the Knights of the Round Table in Arthurian legend. Meaning uncertain, but possibly connected to a Celtic root. Cai is the authentic Welsh spelling and far more interesting than the anglicized version.
Welsh Celtic Names for Girls
Welsh women’s names tend toward the melodic and nature-connected, with a softness that balances the harder consonants of the language.
Rhiannon
From the Brythonic Celtic Rigantonameaning “great queen” or “divine queen,” from riga (queen) and a divine suffix. Rhiannon is a goddess figure in the Mabinogion, associated with horses and the otherworld. The Fleetwood Mac song brought it to a global audience, but the name itself predates that by about 1,500 years.
Branwen
Meaning “white raven” or “blessed raven” in Welsh, from bran (raven) and gwen (white, blessed). Branwen is one of the central figures of the Mabinogion and one of the great tragic heroines of Welsh mythology.
Cerridwen
A Welsh name borne by the enchantress and keeper of the cauldron of inspiration in Welsh mythology. The name is thought to mean “beloved” combined with a word for “white” or “blessed,” though its full etymology is debated. It’s one of the most powerful names in the Celtic tradition.
Arianrhod
Meaning “silver wheel” or “silver disc” in Welsh, from arian (silver) and rhod (wheel, disc). Arianrhod is a goddess figure in the Mabinogion associated with the moon and fate. Long and ceremonial, but extraordinary.
Gwenllian
Meaning “white flood” or “white linen” in Welsh, from gwen (white, blessed) and llian (linen, flood). Gwenllian ferch Gruffudd was a 12th-century Welsh princess who led troops into battle. This name has genuine heroic credentials.
Elspeth
The Scottish and Welsh form of Elizabeth, meaning “my God is an oath” from Hebrew, but thoroughly naturalized into Celtic naming tradition in Scotland and Wales. It has a crispness that the original lacks.
Seren
Simply meaning “star” in Welsh. It’s become one of the most popular girls’ names in Wales over the past two decades, and it deserves every bit of that popularity. Clear, beautiful, and completely Welsh.
Morfudd
Pronounced “MOR-vith,” this Welsh name possibly means “great lord” or is derived from an old Brythonic root. The poet Dafydd ap Gwilym addressed many of his famous medieval Welsh poems to a woman named Morfudd, giving it strong literary associations.
Breton and Pan-Celtic Names
Breton, spoken in Brittany in northwestern France, is a Brythonic Celtic language closely related to Welsh and Cornish. It produced its own set of given names that deserve attention alongside their Goidelic and Welsh counterparts.
Ronan
Shared between Irish Gaelic and Breton tradition, this name means “little seal” from the Celtic root ron (seal). It’s the name of several Irish and Breton saints and has become one of the more internationally accessible Celtic names without losing its authenticity.
Tristan
Of Brythonic Celtic origin, this name is associated with the legendary figure Tristan (or Drystan in Welsh) from the Tristan and Iseult story cycle. The etymology connects to a Celtic root possibly meaning “noise” or “tumult,” though it was later associated with the French word for sadness. Deeply rooted in Celtic legend.
Yannick
A Breton diminutive of Yann (the Breton form of John), widely used in Brittany and with genuine Celtic linguistic roots. It has a casual, friendly energy that contrasts nicely with the more ceremonial feel of many Celtic names.
Nolwenn
A Breton name meaning “holy one from Noyal” or connected to an old Celtic root meaning “saint” or “holy.” St. Nolwenn is a patron saint of Brittany, and the name is distinctively and authentically Breton.
Gwenaëlle
A Breton feminine name meaning “blessed and generous” from gwen (blessed, white) and a root meaning “generous” or “noble.” It’s widely used in Brittany and represents the Breton naming tradition beautifully.
Maëlys
A Breton name from the root maelmeaning “prince” or “chief,” with a feminizing suffix. It’s one of the most popular girls’ names in France today among families with Breton heritage and has real Celtic linguistic credentials.
Gender-Neutral and Cross-Tradition Celtic Names
Some Celtic names travel across the gender divide or have been used for both boys and girls across different traditions.
Rónán
The Irish form of Ronan (listed in the Breton section above in its cross-tradition form) means “little seal” and has been used for both boys and girls in Irish tradition, though it leans male today. It sits comfortably in either column.
Morgan
From the Welsh Morcantmeaning “sea circle” or “sea defender,” from mor (sea) and cant (circle, edge). Morgan le Fay of Arthurian legend and numerous historical Welsh figures have borne it. It works for any gender and has done so for centuries.
Celyn
A Welsh name meaning “holly,” used for both boys and girls in Wales. It’s simple, nature-rooted, and sounds genuinely Celtic without being difficult to pronounce for non-Welsh speakers.
Conan
From the Old Irish and Scottish Gaelic connmeaning “hound” or “warrior,” with a diminutive suffix giving “little warrior.” It was used in Irish, Scottish, and Breton tradition and crosses easily between those cultures.
How to Choose an Authentic Celtic Name
The first question worth asking is which Celtic tradition speaks to you. Irish Gaelic, Scottish Gaelic, Welsh, and Breton are four distinct languages with distinct sounds and naming cultures. An Irish name like Oisín and a Welsh name like Llywelyn have almost nothing in common phonetically, even though both are Celtic. Knowing which tradition you’re drawn to will narrow the field considerably and give your choice more meaning.
Pronunciation is the honest challenge with many Celtic names. Aoife, Caoimhe, Tadhg, and Siobhán (not on this list, but always nearby) trip up English speakers constantly. If the name will live mostly among people unfamiliar with Irish or Welsh phonology, decide in advance whether you’re prepared to be the person who spells it out and corrects it forever. Some parents find that part of the name’s charm; others find it exhausting. Both reactions are valid.
Look at the meaning, not just the sound. Celtic names tend to have meanings that are genuinely striking, “little seal,” “white raven,” “ruler of the wheel,” “dream.” These aren’t vague virtue-words; they’re specific, often mythological, often tied to landscape. A name like Muireann or Arianrhod carries a whole world in its syllables. That’s worth choosing for.
Finally, consider the saint’s name tradition in Irish and Scottish Gaelic culture. Many of the oldest Celtic names were preserved specifically because they belonged to early Christian saints, which meant they stayed in use through centuries of church influence. Names like Brigid, Ciarán, and Ronan have this double life as both ancient and sacred, which gave them extraordinary staying power. That history is part of what you’re choosing when you choose a Celtic name.
Celtic names reward the research you put into them. The more you know about where a name comes from, what it meant, and who bore it, the more you’ll love the one you choose.
