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Vættir (Old Norse; singular Vættr) or wights are nature spirits in Norse mythology. These nature spirits are divided up into 'families', including the Álfar (elves), Dvergar (dwarves), Jötnar (giants), and even gods, the Æsir and Vanir, who are understood to be prominent families among them. The term 'families' (ættir) is often translated as 'clans' or 'races'. These families sometimes intermarried with each other, and sometimes with humans. Sjóvættir (sea spirits) or vatnavættir (water spirits) are guardians of the specific waters.
Húsvættir (house wights) is a collective term for keepers of the household, like the English brownie and the Swedish tomte. The tomte or nisse is a solitary vätte, living on the farmstead. He is usually benevolent and helpful, which can not be said about an innately mischievous illvätte. However, a nisse can cause a lot of damage if he is displeased or angry, including killing of livestock or causing serious accidents.
The Old Norse term véttr/vættr and its English cognate wight are descended from Proto-Germanic *wihtiz (thing, creature), from Proto-Indo-European *wekti- ("object, thing"). Vættr and wight normally refer to supernatural 'being', especially landvættr (land spirit), but can refer to any creature. The Norwegian vette is used much in the same way as the Old Norse vættr, as are the corresponding Swedish cognate vätte (dialect form vätter - Old Swedish vætter) and the Danish vætte. A related form in the Slavic languages can be seen in Old Church Slavonic , (ve?t?), meaning thing, matter, or subject.
Landvættir (land spirits) are chthonic guardians of specific grounds, such as wild places or farms. When Vikings approached land, they reportedly removed their carved dragon heads from the bows of their longships, so as not to frighten and thus provoke the landvættir to attack, thereby incur bad luck from them. Icelandic culture continues to celebrate the supernatural protection over the island, and four landvættr can still be seen in the Icelandic coat-of-arms: a troll-bull, troll-eagle, dragon, and handsome giant. The troll-animals are actually Jötnar who shapeshifted into the form (and mentality) of an animal, and such animals are supernaturally strong. Even the dragon is generally a troll-snake: compare the Jötunn Loki whose children include a wolf, a serpent, and a horse.
Christian concepts influenced Norse concepts but Scandinavian animistic beliefs remain strong. In modern Iceland, work crews building new roads sometimes divert the road around particular boulders that are thought to be the homes of Huldufólk. People continue to report sightings of Trollir, Álfafólk, sea serpents, ghosts and UFOs as in many other Western cultures.
Scandinavian folklore features a class of beings similar to the Old Norse landvættir. They are known by many names, although the most common are vättar in southern Sweden (singular: vätte), vittra in northern Sweden and huldrefolk in Norway (although the singular vittra and huldra, respectively, refer to a solitary and quite different being).
During the 19th century, Peter Christen Asbjørnsen and Jørgen Moe compiled the folk tales among Norwegians, as part of the emotive, nationalistic and anti-rational values of the Romantic Era. These stories reflected the animistic 'folk belief' that preserved earlier elements deriving from the Viking Age but strongly influenced by the medieval Biblical cosmology of Germany, Britain and France. Prominent are stories that reflect later views of the Vættir, usually called the Huldrefolk (from Old Norse Huldufólk), meaning 'concealed people' and referring to their otherworldliness or their power of invisibility.
The English surname 'Wightman' retains the meaning of the word 'wight' and could be transliterated as 'Elf-friend'.