Straight from the Iowa website:
https://licensing.uiowa.edu/traditions
“The University of Iowa borrowed its athletic nickname from the state of Iowa many years ago. The name Hawkeye was originally applied to a hero in a fictional novel, The Last of the Mohicans, written by James Fenimore Cooper. Cooper had the Delaware Indians bestow the name on a white scout who lived and hunted with them.
In 1838, 12 years after the book was published, people in the territory of Iowa acquired the nickname, chiefly through the efforts of Judge David Rorer of Burlington and James G. Edwards of Fort Madison. Edwards, editor of the Fort Madison Patriot, moved his newspaper to Burlington in 1843 and renamed it the Burlington Hawkeye. The two men continued their campaign to popularize the name and were rewarded when territorial officials gave it their formal approval.