A banshee is a female spirit in Irish folklore who heralds the death of a family member, usually by screaming, wailing, shrieking, or keening. Her name is connected to the mythologically important tum
Bunworth Banshee, Fairy Legends and Traditions of the South of Ireland, by Thomas Crofton Croker, 1825
The Banshee Appears, 1862
Aos sí or aos sídhe is the Irish name for a supernatural race in Gaelic folklore, similar to elves. They are said to descend from the Tuatha Dé Danann or the gods of Irish mythology.
Banshee
…shrieking, or keening. Her name is connected to the mythologically important tumuli or "mounds" that dot the Irish countryside, which are known as síde (singular síd) in Old Irish. Sometimes she has long streaming hair, which she may be seen combing, with some legends specifying she can only keen while…
Riders of the Sidhe (1911), painting by John Duncan
Knockshee, County Down, known in Irish as Cnoc Sí ("hill of the fairy mound")
Hawthorn tree, considered in local Irish lore (and Celtic folklore in general) to be sacred to the aos sí