Nisse

A nisse (Danish, Norwegian), tomte (Swedish), tomtenisse, or tonttu (Finnish) 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.

The nisse is one of the most familiar creatures of Scandinavian folklore, and he has appeared in many works of Scandinavian literature.

Source: en.wikipedia.org