Looking for relatives and family history for Peter Hamann, maternal grandfather. Lived in Iowa, possibly farmed near Coon Rapids, Iowa, statedas my mother's birthplace. Wife's name was Ollie Hamann. Children: Raymond Hamann, Clayton Hamann, Clara Hamann, Helen Hamann, Mabel Hamann, Bernice Hamann. My mother's aunt was Emma Bennett,(or Barrett). That aunt was themother of former Nebraska Congressman Jon Christensen. Please reply if any information. Thank you.