Santa's elves have become as integral to Christmas as the big man is. Much like St. Nick, the elves seem to have entered into the Yuletide mythos from a variety of places, including Norse Mythology, the fairy tales of the Brothers Grimm, and mid-19th century literature. It was the introduction of electronic media, however, that further popularized elves, indelibly linking them to Santa Claus and Christmastime.
Source：https://www.cbr.com/iconic-christmas-movie-elves/
