Little documentation exists on English rustic beliefs and terminology before the nineteenth century, but it seems that the term elf was used, at least on some occasions or in some places, for various kinds of uncanny wights, either human-sized or smaller. But other terms were also used.
Wendy and Richard Pini's long-running comic book Elfquest attempts to avoid the usual Tolkienesque elven clichs by placing their elves in a setting inspired by Native American rather than European mythology. It later turns out that they are actually the descendants of a shape-shifting alien race rather than mythological beings.Elves are mythical creatures of Germanic mythology that have survived in northern European folklore. Originally a race of minor gods of nature and fertility, they are often pictured as small, youthful-seeming men and women of great beauty living in forests and other natural places, underground, or in wells and springs. They have been imagined to be long-lived or immortal and magical powers have been attributed to them. Something associated with elves or the qualities of elves is described by the adjectives elfin, elven, elfish, or elvish. Elves are staple characters in modern fantasy. They are also called:In Scandinavian folklore, which is a later blend of Norse mythology and elements of Christian mythology, there are several groups of human-like nature spirits than are akin to "elves" in a modern sense. These are called tomtar, vittror, and lvor, and are grouped under the general name of vttar (compare wights).In Denmark the elves seem to have merged with the Huldra and are beautiful females who can dance a man to death. If you see them from the back, they are hollow.
The elves of Norse mythology have survived into folklore mainly as females. The lvor (Swedish, singular lva) were stunningly beautiful girls who lived in the forest with an elven king. They were long-lived and light-hearted in nature. They could be seen at night dancing over meadows. The circles they left were called lvdanser (elf dances) or lvringar (elf circles). If a human watched their dance, he would discover that even though only a few hours seemed to have passed, many years had passed in the real world. (This time phenomenon is retold in Tolkien's Lord of the Rings when the Fellowship of the Ring discovers that time seems to have run more slowly in elven Lothlrien. It also has a remote parallell in the Irish sdhe).
Tolkien is responsible for reviving the older and less-used terms elves, elven, and elvish rather than Edmund Spenser's invented elfs, elfin, and elfish. He probably preferred the word elf over fairy because elf is of Anglo-Saxon origin while fairy entered English from French.In the Nordic countries where elves have since become associated with Christmas, elves are clad all in red and have long beards and black boots. On Christmas Eve, one must give the elves a bowl of porridge to keep them from playing pranks. In Iceland, from December 12 until Christmas Eve, thirteen elves called the Yule lads visit homes, a lad each day for 13 days, and play tricks on the children, as well as leaving presents for them.The Scandinavian elves were of human size, which allowed "normal" human interactions: for example, in Hrlf Kraki's saga, the Danish king Helgi finds an elf-woman on an island and rapes her. Famous men could be elevated to the rank of elves after death, and in one such case, the full-sized smith hero Vlund is called an elf.The Svartalfar live in Svartalfheim. In some sources they are identified with the dwarfs of Nidavellir, who likewise had a reputation as skilled smiths. In general, however, elves and dwarfs are distinguished in surviving Norse literature.The Harry Potter book series by J. K. Rowling features house-elves that resemble brownies or goblins more than modern high-fantasy elves. Rather like the elves in The Shoemaker & the Elves, Rowling's house-elves are released from servitude when they are given clothes.