Theodor Kittelsen was a Norwegian artist known for his illustrations of Norwegian nature and folklore.
These three pictures all depict the nixie, a water dwelling spirit that would attempt to drown people by luring them into the water, often by taking the shape of a horse
These are elves or huldra, humanoid creatures that are often conflated. Elves are said to dance and create the morning fog while huldra could be said to have tails but have many similar attributes.
Pesta was a personification of the black plague
Polar bear and king Valemon, a Norwegian folk tale
Various trolls
