Jack Frost is a sprite-like character with roots in Viking lore. There, he is known as Jokul Frosti ("icicle frost"). In Britain and United States, Jack is a variant of Old Man Winter and is held responsible for frosty weather, for nipping the nose and toes in such weather, coloring the foliage in autumn, and leaving fernlike patterns on cold windows in winter. Although he has no connection with Christianity, he is sometimes hijacked to appear in modern secular Christmas entertainments, usually as a member of Santa Claus's entourage. He sometimes appears in literature, film, television, song, and video games as a sinister mischief maker.