The crossword solution for the term 'IOWA RELATIVES' is 'OTOES'. Otoes are a Native American tribe that originally lived in Iowa and parts of Missouri, Nebraska, and Kansas. They were part of the larger group of tribes known as the Siouan-speaking people. The Otoes were known for their farming and hunting skills, and they were also skilled traders. Today, the Otoes are federally recognized and have a reservation in Oklahoma.