Vafþrúðnir (Old Norse "mighty weaver") is a wise jötunn in Norse mythology. His name comes from Vaf, which means weave or entangle, and thrudnir, which means strong or mighty. Some interpret it to mean “mighty in riddles”. It may be anglicized Vafthruthnir or Vafthrudnir. In the Poetic Edda poem Vafþrúðnismál, Vafþrúðnir acts as (the disguised) Odin's host and opponent in a deadly battle of wits that results in Vafþrúðnir's defeat.

Vafþrúðnir (Old Norse "mighty weaver") is a wise jötunn in Norse mythology. His name comes from Vaf, which means weave or entangle, and thrudnir, which means strong or mighty. Some interpret it to mean “mighty in riddles”. It may be anglicized Vafthruthnir or Vafthrudnir. In the Poetic Edda poem Vafþrúðnismál, Vafþrúðnir acts as (the disguised) Odin's host and opponent in a deadly battle of wits that results in Vafþrúðnir's defeat.