Yr Ellyll Dan Or Goblin Fire

: Welsh Folk-lore

The Rev. T. H. Evans, in his History of the Parish of Llanwddyn, states

that in that parish Will of the Wisp is called Yr Ellyll Dan. This

is indeed the common name for the Ignis fatuus in most, if not in all

parts of Wales, but in some places where English is spoken it is better

known by the English term, Jack o' Lantern, or Jack y Lantern.