The story
From six + nation + Grand River. From the six nations (Mohawk, Cayuga, Onondaga, Oneida, Seneca, Tuscarora) living on the reserve located on the Grand River (of Ontario that feeds into Lake Erie).
Etymology from Wiktionary, CC BY-SA 4.0.
Six Nations of the Grand River
Today it means: The largest First Nations Indian reserve in Canada; located on the Grand River of Ontario that feeds into Lake Erie. Full definition →