A witch dwells to the east of Midgard, in the forest called Ironwood: in that wood dwell the troll-women, who are known as Ironwood-Women [járnviðjur]. The old witch bears many giants for sons, and all in the shape of wolves; and from this source are these wolves sprung. The saying runs thus: from this race shall come one that shall be mightiest of all, he that is named Moon-Hound [Mánagarmr]; he shall be filled with the flesh of all those men that die, and he shall swallow the moon
The form "Járnviðjur" ("Ironwoodite"[1]) is nowhere else to be found, but in singular, Járnviðja is listed in the
þulur as a troll-wife, and in 10th century
skaldEyvindr Skáldaspillir's Háleygjatal (2), referring to the goddess
Skaði.