The Green Knight (Danish: Den grønne Ridder)[1][2] is a Danish fairy tale, collected by Svend Grundtvig (1824-1883) in Danish Fairy Tales (18??)[3] and by Evald Tang Kristensen (1843-1929) in Eventyr fra Jylland (1881).[4] Andrew Lang included a translation of Kristensen's version in The Olive Fairy Book (1907).[4]
This tale combines Aarne-Thompson type 510A with type 425N, the bird husband, and type 432, the prince as bird.[3] Others of the first type include Cinderella, The Sharp Grey Sheep, The Golden Slipper, The Story of Tam and Cam, Rushen Coatie, Fair, Brown and Trembling, and Katie Woodencloak;[5] of the second two, The Feather of Finist the Falcon, The Blue Bird, and The Greenish Bird.