English

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English Wikipedia has an article on:
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Etymology

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All counties are named after the Sioux people.

Proper noun

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Sioux County

  1. One of 99 counties in Iowa, United States. County seat: Orange City.
  2. One of 93 counties in Nebraska, United States. County seat: Harrison.
  3. One of 53 counties in North Dakota, United States. County seat: Fort Yates.

References

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