organized as a U.S. territory 1838; admitted as a state 1846, named for the river, ultimately from the name of the native people, of the Chiwere branch of the Siouan family; said to be from Dakota ayuxba "sleepy ones," or from an Algonquian language (Bright cites Miami/Illinois /aayohoowia/). On a French map of 1673 it appears as Ouaouiatonon. John Quincy Adams, in his diary entries on the House of Representatives debate on the territorial bill in 1838, writes it Ioway. Related: Iowan.
updated on December 09, 2020