Nebraska is from a Native American word meaning flat or spreading water. In the Omaha dialect it is niubthatka. In Oto it is nebrathka. The name was originally applied to both the Nebraska and Platte Rivers and from there transferred to the territory and state.1
1Illustrated Dictionary of Place Names: United States and Canada, edited by Kelsie B. Harder (New York: Van Nostrand Reinhold Company, 1976), 372.
Copyright 1997-2013, by David Wilton