Of all the O’Dubhda folktales, the Roslee Giant sits most clearly inside a wider Irish pattern. It is a Gaelic comedy, short and finished, and it ends in the punchline of the bitten finger. What is interesting about it is not its originality — it is a known Irish folk-tale with its hero replaced. The mechanism of that replacement is the point.

I.  The story at Roslee

The Schools’ Collection version, from Easky:

“Roslee Castle, which was built in the 13th century and passed on to O’Dowd in the 16th century, was inhabited by a giant and his wife. The giantess one day was out walking and she met a man named O’Dowd and she put him in her apron and carried him home. She had a cradle made and O’Dowd was put into it. A giant from Scotland came one day to fight the Roslee giant. The Scottish giant entered the castle. He saw no one, only the giant’s wife with the child in the cradle. “What’s the child’s age?” said the Scottish giant. “He’s two years old on May Day,” she said. The giant put his finger in the child’s mouth to see if it had the back teeth. The child, which was the O’Dowd, bit his finger so badly that he said to himself, “It’s time for me to be off to Scotland now, for what must the father of such a child be like?” And that folktale was used to explain how the O’Dowds got the castle.”

— Bailíuchán na Scol, Sligo volume, c.1938

The story is self-contained. No further detail is offered and none is needed: the Scot flees, the O’Dowd — grown up, presumably — inherits Roslee from his giant foster-parents.

II.  The known parallel

This is not a new story. It is a well-known Irish folktale, usually called the Giant’s Causeway or Fionn and Benandonner tale, in which the Irish giant Fionn mac Cumhaill tricks the Scottish giant Benandonner who has come to fight him. Fionn’s wife Oonagh disguises him as a baby in a cradle; Benandonner sees the “baby,” reasons that the father must be enormous, and flees back to Scotland, tearing up the Giant’s Causeway behind him. It is one of the most widely told tales in the Irish folk repertoire, printed by Patrick Kennedy (1866) and W. B. Yeats (1888), and recorded across every county in the Schools’ Collection.

A local substitution. At Roslee, Fionn has been replaced by the O’Dowd. The giantess is no longer Oonagh, the giant she replaces is nameless, and the hero in the cradle is explicitly identified as an O’Dowd. The core comic mechanics — the disguised baby, the finger, the teeth, the flight — are preserved intact. What changes is the name.

III.  Why the substitution matters

This kind of substitution is not unusual in Irish folk-tradition; it is one of the standard mechanisms by which local communities attach themselves to the heroic cycle. But the particular substitution at Roslee is culturally significant for what it says about how the O’Dubhda were remembered. Fionn mac Cumhaill is the paramount Irish legendary hero — the leader of the Fianna, the subject of a thousand tales, the figure against whom all others are measured. To place an O’Dowd in a Fionn story, in Fionn’s role, is to claim a place for the clan in the national legendary cycle.

The O’Dowd is fostered. And the claim is not casual. The Roslee giantess carries the baby O’Dowd home in her apron. The O’Dowd is not merely the hero of the tale — he is the chosen child of the giants, fostered by them, grown up in their castle. When the Scottish giant comes, the O’Dowd is already the giantess’s ward. The finger-biting is not the victory of a wit outside the giant-world but the announcement of the O’Dowd inside it. The folktale is, in effect, the clan’s fosterage into the legendary register.

Castle inheritance by legend. There is one further detail worth noting. The story is also the tale that explains how the O’Dowds got Roslee. The historical record has the castle built in the thirteenth century by Anglo-Norman or Gaelic hands (the attribution is unclear) and passing into O’Dubhda possession in the sixteenth century. The folklore skips the politics entirely and offers a legendary inheritance instead: the O’Dowds got the castle because they were raised in it, because the giants claimed them, because they were there before there was a record.

IV.  Reading the tale

Three things the Roslee tale does that a straight Fionn story would not.

It grounds the O’Dubhda in Fenian-scale legend. To be the child in the cradle is to be the equivalent, in folk imagination, of Fionn himself.

It offers an alternative history of the castle. Real conquest politics are replaced by giant fosterage. The community is saying, in the idiom of folklore, that the castle was always theirs.

It asserts cultural superiority against an external threat. The Scot comes to fight; he flees without fighting, defeated by the sheer suggestion of what the O’Dowd lineage contains. In a tradition that otherwise chronicles O’Dubhda loss — the Mermaid Rocks, the Dancing Shoes — this is a rare story of O’Dubhda prevailing, though through cunning rather than force.

V.  Sources and attestations

• Bailíuchán na Scol / The Schools’ Collection (1937–1939) — the Roslee version quoted above; digitised at dúchas.ie.
• Kennedy, Patrick, Legendary Fictions of the Irish Celts (London, 1866) — an early nineteenth-century printed version of the Fionn-and-Benandonner tale.
• Yeats, W. B. (ed.), Fairy and Folk Tales of the Irish Peasantry (London, 1888) — carries the standard Fionn version of the tale.
• Ó Súilleabháin, Seán, A Handbook of Irish Folklore (Dublin, 1942) — classifies the tale-type (ATU 1149) and discusses local substitutions.
• Dowd, Marion, “Mermaids, Kings and Castles: O’Dowd Folklore” (address to the O’Dubhda Clan Gathering, 8 October 2025) — the Fionn-transposition reading.