Biróg (Biroge of the Mountain, Birog), in

Irish folklore Irish folklore () refers to the folktales, balladry, music, dance and mythology of Ireland. It is the study and appreciation of how people lived. The folklore of Ireland includes banshees, fairies, leprechauns and other mythological creatures, ...

is the '' leanan sídhe'' or the female

familiar spirit In European folklore of the Middle Ages, medieval and early modern periods, familiars (strictly familiar spirits, as "familiar" also meant just "close friend" or companion, and may be seen in the scientific name for dog, ''Canis familiaris'') w ...

Cian In Irish mythology, Cian or Cían (), nicknamed Scal Balb, was the son of Dian Cecht, the physician of the Tuatha Dé Danann, and best known as the father of Lugh Lamhfada. Cían's brothers were Cu, Cethen, and Miach. Cían was slain by th ...

who aids him in the folktale about his wooing of Balor's daughter Eithne. She is reinvented as a druidess in

Lady Gregory Isabella Augusta, Lady Gregory (; 15 March 1852 – 22 May 1932) was an Anglo-Irish dramatist, folklorist and theatre manager. With William Butler Yeats and Edward Martyn, she co-founded the Irish Literary Theatre and the Abbey Theatre, and wrot ...

and T. W. Rolleston's retellings.

Attestations

A version of the folktale recorded by John O'Donovan in 1835 relates how the Fomorian warrior Balor, to frustrate a prophecy that he would be killed by his own grandson, imprisons his only daughter Eithne in the tower of

Tory Island Tory Island, or simply Tory, is an island 14.5 kilometres (7+3⁄4 nautical miles) off the north-west coast of County Donegal in the north-west of Ulster, the northern Provinces of Ireland, province in Ireland. It is officially known by its Iris ...

, away from any contact with men. But Biroge of the Mountain helps a man called Mac Cinnfhaelaidh (Mac Kineely), whose magical cow (Glas Gaivlen ''recté'' Glas Gaibhnenn) Balor stole, to gain access to the tower and seduce her. Eithne gives birth to triplets, but Balor gathers them up in a sheet and sends a messenger to drown them in a whirlpool. The messenger drowns two of the babies, but unwittingly drops one in the harbour, where he is rescued by Biróg. She takes the child back to his father, who gives him to his brother, Gavida the smith, in

fosterage Fosterage, the practice of a family bringing up a child not their own, differs from adoption in that the child's parents, not the foster-parents, remain the acknowledged parents. In many modern western societies foster care can be organised by ...

. The boy (identified in the tale only as the "heir of Mac Kineely") who grows up to kill Balor, is more explicitly identified as

Lugh Lugh or Lug (; ) is a figure in Irish mythology. A member of the Tuatha Dé Danann, a group of supernatural beings, Lugh is portrayed as a warrior, a king, a master craftsman and a saviour.Olmsted, Garrett. ''The Gods of the Celts and the I ...

in Lady Gregory and T. W. Rolleston' retelling. Lady Gregory refers to her as Birog the druidess, and T. W. Rolleston gives her orthography as Biróg.

References

Mythological Cycle Fairies Female legendary creatures Familiars {{celt-myth-stub