Character Name
Fionn
Fionn Fionn carries the aura of a born leader — fair-minded, courageous, and possessed of unusual wisdom. The mythological Fionn mac Cumhaill was as renowned for his knowledge and poetic gifts as his martial prowess, making this name ideal for characters who lead through wisdom rather than brute force. There is something inherently noble about the name, suggesting a character who protects his community and earns loyalty through integrity.
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Famous characters named Fionn
Fionn mac Cumhaill
The Fenian Cycle — Traditional Irish Mythology
The legendary leader of the Fianna, Ireland's greatest warrior-hero who gained wisdom from the Salmon of Knowledge and commanded a band of elite fighters.
Finn
Finn Family Moomintroll — Tove Jansson
While not directly Celtic, the name's widespread use reflects the mythological hero's enduring cultural resonance.
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Related names
Fergus
Old Irish · “Derived from the Old Irish elements "fer" meaning "man" and "guss" meaning "vigour", "strength", or "force" — together meaning "man of vigour" or "strong man". The name was borne by several early rulers of Ireland and Dál Riata, and most notably by the hero Fergus mac Róich of the Ulster Cycle, a warrior of extraordinary physical power and loyal character.”
Diarmuid
Old Irish · “Derived from the Old Irish "Diarmait", possibly from "di" (without) and "airmit" (envy) — meaning "without envy" or "free from jealousy". Alternatively interpreted as "freeman". In Irish mythology, Diarmuid Ua Duibhne was the most handsome warrior of the Fianna, whose magical "love spot" on his forehead caused any woman who glimpsed it to fall instantly in love with him, leading to the legendary elopement with Gráinne.”
Cormac
Old Irish · “Derived from the Old Irish "corb" meaning "chariot" (or possibly "raven") and "mac" meaning "son" — giving the meaning "son of the chariot" or possibly "charioteer's son". The name was borne by the legendary High King Cormac mac Airt, considered one of Ireland's greatest and wisest kings, whose court at Tara became associated with an idealised golden age of justice and prosperity.”
Conor
Irish · “Anglicised form of the Irish "Conchobar" or "Conchobhar", derived from "con" (dog or wolf, used as an honorific for a great warrior) and "cobhar" (desiring or loving) — together possibly meaning "lover of hounds" or "wolf-lover". Conchobar mac Nessa was the king of Ulster in the Ulster Cycle of Irish mythology, the lord who ruled over the great warriors including Cúchulainn.”
More Old Irish names
Granuaile
“The Old Irish form of Grace, from "Gráinne" (itself possibly related to "grán", grain or sun) combined with the epithet "Mhaol" (bald, or of the cropped hair). Granuaile (Grace O'Malley, c. 1530–1603) was the legendary Irish chieftain and pirate queen of Connacht who commanded a fleet of ships, led her clan in armed rebellion against English expansion, and famously negotiated face-to-face with Queen Elizabeth I. She became one of the most celebrated figures in Irish folk memory.”
Eoin
“The Old Irish form of John, derived from the Latin Iohannes and ultimately from the Hebrew Yohanan meaning "God is gracious". Eoin entered Ireland through the early Christian Church and has remained in continuous use for over a thousand years. It is distinct from the later anglicised "Seán" (which came via Norman French) and is considered the more archaic, native form of the name in Irish.”
Emer
“Possibly derived from Old Irish elements meaning "swift" or related to the Proto-Celtic root for strength or readiness. Emer (also spelled Éimear) is the wife of the hero Cú Chulainn in the Ulster Cycle — but unlike most mythological wives, she is no passive figure. She is renowned for possessing all six gifts of womanhood: beauty, voice, sweet speech, needlework, wisdom, and chastity. She also successfully argues her case against a goddess for the right to her husband's love.”
Niamh
“Derived from the Old Irish word "niamh" meaning "bright" or "radiant". The name belongs to one of the most celebrated figures of Irish mythology, Niamh of the Golden Hair, a princess of Tír na nÓg (the Land of Eternal Youth) who fell in love with the poet-warrior Oisín and carried him away on her white horse across the sea.”
Ciarán
“Derived from the Old Irish "ciar" meaning "dark", "black", or "dark-haired", with the diminutive suffix "-án" giving "little dark one". The name was borne by two major Irish saints: Saint Ciarán of Clonmacnoise (c. 512–545 AD), who founded the great monastery of Clonmacnoise on the River Shannon — one of the most important centres of early medieval learning in Europe — and Saint Ciarán of Saighir, one of the earliest Irish saints.”
Liadan
“From the Old Irish "líadan" meaning "grey lady" or "lady of the grey hair", from "lía" (grey) and the feminine suffix. Liadan is the protagonist of one of the most moving love stories in early Irish literature — the tale of Líadan and Cuirithir, two poets who fall in love but whose relationship is destroyed when Líadan takes holy vows, choosing religious devotion at the cost of human love. The surviving lament attributed to her is among the earliest and most beautiful poems in Old Irish.”
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