Iron John

"Iron John" (also "Iron Hans"; German: Der Eisenhans) is a German fairy tale found in the collections of the Brothers Grimm, tale number 136, about an iron-skinned wild man and a prince. The original German title is Eisenhans, a compound of Eisen "iron" and Hans (like English John, a common short form of the personal name Johannes). It represents Aarne–Thompson type 502, "The wild man as a helper".

Most people see the story as a parable about a boy maturing into adulthood. The story also became the basis for the book Iron John: A Book About Men by Robert Bly which spawned the mythopoetic men's movement in the early 1990s. The book spent 62 weeks on The New York Times Best Seller list.