According to the Prose Edda, Laufey is the mother of Loki, Býleistr, and Helblindi by the jötunn Fárbauti. In the short narrative Sörla þáttr, Laufey was thin and meagre, and so she was called Nál, "Needle." She and Fárbauti, who is here a peasant, had only one son, Loki.
Snorri Sturluson refers to Loki several times by the matronym Loki Laufeyjarson. He says that a valid kenning for Loki is Son of Fárbauti and Laufey.
- Gylfaginning, 33, 42, 49.
- Skáldskaparmál, 16.
- Sörla þáttr, 1.
- Þrýmskviða, 18, 20.