The Element Encyclopedia of Witchcraft: The Complete A-Z for the Entire Magical World - Judika Illes 2005
The Korrigans (also spelled Corrigans) allegedly did not begin existence as spirit beings; once upon a time they were Pagan Breton princesses who opposed Christianity and were transformed into fairies, whether as punishment (the “official” story) or reward is subject to interpretation. Another explanation suggests that they were Druidesses, although theoretically there’s no reason they couldn’t be both.
As spirits, they now manifest either as mermaids or as land-living fairies. They are usually described as beautiful, long-haired women wearing flowing white garments, but they can also manifest as fierce hags, especially when encountered in the daylight.
The Korrigans are most frequently encountered in the forest or by streams. They travel in packs and like to have fun, dancing among stone circles and menhirs and leading travelers astray with their beautiful voices and mysterious fairy torchlight. Allegedly, they especially enjoy playing tricks on priests.
The Korrigans helped Princess Dahut build the magical crystal city, Ys. They are among those spirits accused of stealing human babies and leaving changelings behind.
See below Changeling; DIVINE WITCH: Dahut.