This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Korrigan (Breton)
In Breton folklore, a Korrigan is a fairy or dwarf-like spirit. The word korrigan means in Breton "small-dwarf" (korr means dwarf, ig is a diminutive and the suffix an is a hypocoristic). It is closely related to the Cornish word korrik which means gnome. The name changes according to the place.
Korrigans have beautiful hair and red flashing eyes. They are sometimes described as important princesses or druidesses who were opposed to Christianity when the Apostles came to convert Brittany. They hate priests, churches, and especially the Virgin Mary. They can predict the future, change shape, and move at lightning speed.