British Goblins: Welsh Folk Lore, Fairy Mythology, Legends and Traditions

by Wirt Sikes

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.