Hesseltine's of IA

Is there anyone who knows about the Hesseltine family in Iowa. I have information on a Mary Wilma June Hesseltine b. 6/09/1868 Brighton, Washington Co., IA m. John Wesley Wiles 10/02/1889 d. 8/17/1964 Wellman, Washington Co., IA. Her parents were Elih Hesseltine b. 12/15/1842 d. 5/22/1925 and Hannah Taylor b. 12/25/1844 d. 6/23/1926.
I have not determined where they came from prior to appearing in Washington Co., IA. Any help would be appreciated.