Járnviðr

In Norse mythology, Járnviðr (Old Norse "Iron-wood") is a forest located east of Midgard, inhabited by troll women who bore jötnar and giant wolves. Járnviðr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.