ELF n.
the English rural folk who often find these objects of prehistoric make in the fields and formerly attributed them to fairies; -- called also elf bolt, elf dart, and elf shot. -- Elf child, a child supposed to be left by elves, in room of one they had stolen. See Changeling. -- Elf fire, the ignis fatuus. Brewer. --…
EN- n. 2 definitions
A suffix from AS. -an, formerly used to form the plural of many nouns, as in ashen, eyen, oxen, all obs. except oxen. In some cases, such as children and brethren, it has been added to older plural forms.