The companions of Saint Nicholas are a group of closely related figures who accompany St. Nicholas throughout the territories formerly in the Holy Roman Empire. These characters act as a foil to the benevolent Christmas gift-bringer, threatening to thrash or abduct disobedient children. Jacob Grimm (Deutsche Mythologie) associated this character with the pre-Christian house spirit (kobold, elf) which could be benevolent or malicious, but whose mischievous side was emphasized after Christianization. The association of the Christmas gift-bringer with elves has parallels in English and Scandinavian folklore, and is ultimately and remotely connected to the modern Christmas elf in American folklore.
Names for the "dark" or threatening companion figure include: Knecht Ruprecht in Germany, Krampus in Austria, Bavaria, Croatia, Slovenia, Friuli, Hungary (spelled Krampusz); Klaubauf in Bavaria, Austria; Bartel in Styria; Pelzebock; Befana; Pelznickel; Belzeniggl; Belsnickel in the Palatinate (and also Pennsylvania, due to Pennsylvania Dutch influence); Schmutzli in Switzerland; Rumpelklas; Bellzebub; Hans Muff; Drapp; Buzebergt in Augsburg and Little Babushka in Russia.