Because of this I added a short entry on her on the Characters page. A few other characters in the story had some information added as well, but that page is far from complete. Below I am including the short blurb on the Cailleach (with both mythological information, and in story since I claim poetic license).
Cailleach - An Irish/Scottish Goddess of disease and plague to some. Others count her as The Washer Woman and/or Banshee. The Cailleach is also part of the Maiden/Mother/Crone trinity of Goddesses. There are actually several goddesses that fill this role, and several goddess trinities in Celtic mythology. Monstrous dogs are said to guard the gates to her underworld realm (the land of Death). In this story I hope to have the chance to capture more than one side of her in her brief appearances. As one might expect, in this the nameless Things will be her "children" in much the same way as the various types of merfolk are Mara's.