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The Scahentoarrhonon or Scahentowanenrhonon were a little-known indigenous people of North America originally from the Wyoming Valley, Pennsylvania, which they called Scahentowanen ('It is a very great plain').
Little is known of the Scahentoarrhonon. They are first encountered in the Jesuit Relation for 1635. They appear to have been destroyed as an entity by the Iroquois in 1652; survivors may have been assimilated by one or more of the Five Nations.
Scahentoarrhonon was an Iroquoian language and may have been related to Susquehannock, Wyandot, Erie and Wenrohronon.