The Ellylldan is a species of elf exactly corresponding to the English Will-o'-wisp, the Scandinavian Lyktgubhe, and the Breton Sand Yan y Tad. The Welsh word dan means fire; dan also means a lure; the compound word suggests a luring elf-fire. The Breton Sand Yan y Tad (St. John and Father)[13] is a double ignis fatuus fairy, carrying at its finger-ends five lights, which spin round like a wheel. The negroes of the southern seaboard states of America invest this goblin with an exaggeration of the horrible peculiarly their own. They call it Jack-muh-lantern, and describe it as a hideous creature five feet in height, with goggle-eyes and huge mouth, its body covered with long hair, and which goes leaping and bounding through the air like a gigantic grasshopper. This frightful apparition is stronger than any man, and swifter than any horse, and compels its victims to follow it into the swamp, where it leaves them to die.