Every Celtic name carries a story; Chailleach carries more than one.
The story
The Cailleach is the one who bring the frost, the one who sends the world into winter, but this is indicative of a bigger theme. She rules over transformation, the cycles of death and rebirth, overcoming fear, darkness, and silence.
Other Celtic figures on The Veiled Deck: Badb, Brigid, Cernunnos.