Cerridwen was originally worshipped by the people of Wales. It is told that she lived on an island, in the middle of Lake Tegid, named after her husband, with her two children, a beautiful daughter, Creidwy, and a very ugly son, Afagdu. To compensate her son for his unfortunate appearance, Cerridwen brewed a magical formula, known as "greal", (is this where the word Grail came from, I wonder?) which would make Afagdu the most brilliant and inspired of men. For a year and a day, she kept six herbs simmering in her magical cauldron, known as "Amen", under the constant care of a boy named Gwion.
One day, while Gwion was stirring the cauldron, a few drops of the bubbling liquid spattered on his hand. Unthinkingly, and in pain, Gwion, sucked his burned hand, and, suddenly, he could hear everything in the world, and understood all the secrets of the past and future. With his newly enchanted foresight, Gwion knew how angry Cerridwen would be when she found he had acquired the inspiration meant for her son.
He ran away, but Cerridwen pursued him. Gwion changed into a hare, and Cerridwen chased him as a greyhound; he changed into a fish, and Cerridwen pursued him as an otter; he became a bird, and she flew after him as a hawk; finally, he changed into a grain of corn, and Cerridwen, triumphant, changed into a hen, and ate him.
When Cerridwen resumed her human form, she conceived Gwion in her womb, and, nine months later, gave birth to an infant son, whom she, in disgust, threw into the water of a rushing stream. He was rescued by a Prince, and grew into the great Celtic bard, Taliesin.