Wafthrudnir ( Old Norse Vafthrudnir " the strong entangling " ) is in Norse mythology, the name of a wise giant.

The giant does not belong to popular mythology, but is a creation of the poet of Vafþrúðnismál ( Wafthrudnirlied ). In this song Wafthrudnir Odin and enter into a knowledge contest against each other. In the end, subject to the giant Odin, because he can not answer the last question. The non- answerable question, what Odin his dead son Balder whispered in his ear before he was placed on the pyre, the giant cost of living.