Kith and Kin of The Cailleach
Most people try to stick The Cailleach in with the Celtic pantheon of Deities, and the rare story may try to link her to other Deities, plus of course, there are many stories pairing her with Brigid as her opposite.
Here again though, the scant bits of evidence available would seem to indicate that The Cailleach was a presence in and around the British Isles long before those first Celts ventured off the European mainland.