Jokao/Stonecoats
The Jokao are creatures from the myths of the Iroquois and Seneca people. They are a form of cannibal giant, whose bodies are covered in stone plates. They are often created in a very harsh winter, most often during famine when people were forced to eat their neighbors to survive.
Citations:
Bane, Theresa. Encyclopedia of Giants and Humanoids in Myth, Legend and Folklore. United States, McFarland, Incorporated, Publishers, 2016.