Before the draining of the Grand Kankakee Marsh, the body of water at Fish Lake was known in French as Lac Tipiconeau. It was then located on the main stream of the Kankakee, just upstream of its confluence with Potato Creek. The lake took its name from the French term for buffalo fish, and this name in turn likely led to the modern English name "Fish Lake".
In 1702, Pierre Le Moyne d'Iberville noted that following the end of the Beaver Wars a group of Miami people had settled at "Atihipi-Catouy". According to linguist Michael McCafferty this name "appears to be a gnarled form of Miami-Illinois kiteepihkwanonki, 'at the buffalo fish'", referring to Lac Tipiconeau.
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