Beira / Cailleach

The sources do not record a single unified origin tale for the figure; rather, Gaelic tradition treats the Cailleach (literally 'old woman, hag') as a mythic personification of winter and a landscape-maker. In Scottish material she is commonly identified by the name Beira and in modern Irish folklore studies is sometimes called the Hag of Beara. Scholarly treatments place her within a seasonal cosmology in which an older winter female figure is opposed to or succeeded by a younger spring/summer goddess (for example Brìgde/Brigid), a pattern attested across Ireland, Scotland, and the Isle of Man in the material cited.

Primary descriptions in the cited sources are generic: she is characterized as an 'old woman' or 'hag' (the literal meaning of cailleach in modern Irish and Scottish Gaelic). The provided materials do not give consistent, detailed accounts of clothing, stature, or specific iconography; instead the term applies across multiple local mythological and folkloric figures which display regional variation in stories and images.

According to the cited sources, the Cailleach/Beira is associated with the creation of landscape features and with control over weather, especially storms and winter. She functions as the seasonal personification of winter, exercising agency over environmental transformation (both destructive and formative) in Gaelic cosmology. The supplied material does not provide further enumerated magical powers or detailed accounts of interactions with humans.