Naglfari
Naglfari is a figure in Norse mythology, appearing primarily in the Poetic Edda, specifically in the poem Vafþrúðnismál. He is the father of the god Loki. In Vafþrúðnismál, the giant Vafþrúðnir taunts Odin, stating that Naglfari is Loki's father and that Laufey is his mother. This brief mention is one of the few sources that names Loki's father.
Beyond this single mention, there is very little information available about Naglfari in the surviving Norse
The name Naglfari itself is sometimes interpreted as relating to "Naglfar," the ship made from the fingernails