In Norse mythology, Im or Imr is a giant and the son of Vafthrudnir. According to stanza 5 of the poem Vafthrudnismal from the Poetic Edda:
"Then Odin went to try the wisdom of the all-wise giant [Vafthrudnir]; to the hall he came which Im's father owned; Odin went inside."Im is also mentioned in a list of giants in the Skaldskaparmal section of the Prose Edda by Snorri Sturluson.
References
Im (jötunn) Wikipedia(Text) CC BY-SA