Have you heard the last name of Heller before? My great grandmother was Mrs. Pius Christen and her name was Hattie Pohl-the same one you mentioned in your query. She also stayed at Grundy Center Iowa upon arriving in America with her sister Mary (Pohl) Heller. Mary's husband's name was Louis or "Lew." There was also a brother named William Pohl. You may also want to consider the name Kissell or Kuessell as she was also either a close friend or relative from the same area in Rokinitz who settled in New Helena Nebraska.