Frederick Feikema Manfred was an American writer of Westerns, very much connected to his native region: the American Midwest, and the prairies of the West. He named the area where the borders of Minnesota, Iowa, South Dakota, and Nebraska meet "Siouxland."

Doon is a city in Lyon County, Iowa, United States, along the Rock River. The population was 619 at the time of the 2020 census. The BNSF Railway passes through Doon.