Arndt A Larson son of Lars Peder Andreasen

I am looking for help finding immigration information on this family. Arndt is my great great grandfather. The US 1880 census has him and his family living in Onalaska Wi. His birth place is shown as Norway, Rognhajen, Rana, I believe. His birth date is 12 Oct 1942. The records I have found show both is father and mother, Anne Andersdatter Almlia passed away in Norway. Any help is greatly appreciated. Thanks