The Confederated Tribes of Coos, Lower Umpqua, and Siuslaw Indians trace their ancestry back to the aboriginal inhabitants of the South-Central coast of Oregon. The confederation is made up of three tribes (four Bands): two bands of Coos Tribes: Hanis Coos (Coos Proper), and Miluk Coos; the Lower Umpqua Tribe; and Siuslaw Tribe.
The Confederated Tribes of Siletz Indians of Oregon generally include Clatsop, Chinook, Klickitat, Molala, Kalapuya, Tillamook, Alsea, Siuslaw/Lower Umpqua, Coos, Coquelle, Upper Umpqua, Tututni (including all the lower Rogue River Bands and those extending up the coast to Floras Creek and down to Whales Head
The federally recongnized Coqille Indian Tribe is descended from people who inhabited the watersheds of the Coquille River system, a small portion of Coos Bay at the South Slough, and areas north and south of the Coquille River mouth where it enters the ocean at present day Bandon, Oregon.
The Abenaki tribe, together with the Maliseet, Passamaquoddy, Mi'kmaq, and Penobscot Indians, were members of the old Wabanaki Confederacy, adversaries of the Iroquois. These allies from the eastern seaboard spoke related languages, and Abenaki and Wabanaki have the same Algonquian root, meaning "people from the east."