Keewaycooshcum (literally "Long Nose") (d.1839), also spelled Keewacoosheum, Kewikishkum, or Kewaykishkum, was a leader of the Grand River Band of Ottawa Nation Native Americans at the Flat River in what would become the U.S. state of Michigan. In 1821, he defied his tribe and signed the Treaty of Chicago, ceding all Ottawa territory south of the Grand River to the United States. After signing the treaty, Keewaycooshcum was exiled by his band north to the Manistee River. Over the following decades, he and has family were murdered for his role in the treaty.