 In the "Sörla þáttr", an Icelandic short story written by two Christian priests in the 15th century, Dvalin is the name of one of the four dwarves (including Alfrigg, Berling and Grer) who fashioned a necklace which was later acquired by a woman called Freyja, who is King Odin's concubine, after she agreed to spend a night with each of them.J.