The Iowa (also spelled Ioway) are a Native American Siouan people. Today they are enrolled in either of two federally recognized tribes, the Iowa Tribe of Oklahoma and the Ioway Tribe of Kansas and Nebraska. Together with the Missouria and the Otoe, the Ioway are part of the Chiwere-speaking peoples, claiming the Ho-Chunks as their ''grandfathers.'' Their estimated population of 1,100 (in 1760) dropped to 800 (in 1804), a decrease caused mainly by smallpox, to which they had no natural immunity. In 1824, the Iowa were moved from Iowa to reservations in Brown County, Kansas, and Richardson County, Nebraska. Bands of Iowa moved to Indian Territory in the late 19th century and settled south of Perkins, Oklahoma, becoming the Iowa Tribe of Oklahoma. Their name has...'