The Banshee, from the Irish “bean sí” (“woman of the síde” or “woman of the fairy mounds”) is a female spirit in Irish folklore, usually seen as a harbinger of death, as well as a messenger from the Otherworld. In Irish legend, a banshee is a fairy woman who begins to wail if someone is about to die.
Diancecht was the Irish god of Healing and Medicine in Celtic culture during the Bronze age in Ireland. Diancecht was the son of Dagda, "the good god of the Irish Celts", and was the physician to the Tuatha De Danaan, the ruling clan of gods. His son, Miach, was also a healer but preferred to use incantations and herbs when healing which was at odds with his father's surgical methods.