Jarnvid

They dived amid beeches under which nothing grew, the younger boughs still retaining their hectic leaves, that rustled in the breeze with a sound almost metallic, like the sheet-iron foliage of the fabled Jarnvid wood.

The Woodlanders 2006

Then the ancient witch who lived in Jarnvid, the Iron Wood, fed the Wolf Managarm on unburied men and on the corpses of those who fell in battle.

The Children of Odin The Book of Northern Myths Padraic Colum 1926