Nisse (folklore)
A nisse, tomte, tomtenisse, or tonttu is a mythological creature from Nordic folklore today typically associated with the winter solstice and the Christmas season. They are generally described as being short, having a long white beard, and wearing a conical or knit cap in gray, red or some other bright colour. They often have an appearance somewhat similar to that of a garden gnome.
https://en.wikipedia.org/wiki/Nisse_(folklore)