Winnebago

google

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Algonquian, literally ‘person of the dirty water’, referring to the muddy Fox River.

wiktionary

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Genericization of the trademark Winnebago

etymonline

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Winnebago

"Siouan people of eastern Wisconsin," 1766, from Potawatomi winepyekoha, literally "person of dirty water," in reference to the muddy or fish-clogged waters of the Fox River below Lake Winnebago. As a type of motor vehicle, attested from 1966.