Hans Johansen Johnson ( Lystne) Gunhild Pederson

Hans Johansen Johnson upon arriving in America changed the name to Hans J. Lystne. Hans J. Lystne and his wife, Gunhild, (Pederson) were both born in Nordreland, Norway. Gunhild in August of 1848 and Hans in April of 1852. They were married in 1875 and immigrated to America (MN) in 1883. Hans, 31, and oldest son, John, 9, left Oslo, Norway on prepaid tickets for New York in June, 1883. Gunhild, 35, Berte Maria, 5, Hans. Jr., 4, Olaf, 1, left September 14, 1883, on prepaid tickets for New York. Olaf, age 1, died on the ship coming over and was buried at sea. I am looking for any information on their whereabouts in Norway. Searches of Norwegian cenuses have not proved conclusive and they do not show up in the LDS records. Does anyone have any information on this family in Norway?