In Odd and the Frost Giants by Neil Gaiman, the one-legged boy who helps the Norse gods is Odd.
Published in 2008, the children’s fantasy novel follows Odd, a young Viking living in a village troubled by an unusually harsh winter. After entering a strange forest, he encounters figures connected with Norse mythology and becomes involved in a quest to drive the frost giants from Asgard.
The story draws on recognizable mythic figures including Odin, Thor, and Loki, but it is an original modern adventure rather than a translation of an Eddic poem. Gaiman presents the gods in a form accessible to younger readers while retaining elements such as Asgard, giants, and the relationship between the human and divine worlds.
Odd’s disability is central to the story but does not define his courage or ingenuity. The name can also cause confusion with Oddr, a name found in several medieval Scandinavian stories; Gaiman’s protagonist is the fictional boy of this particular novel.