Sather / Overson

I am having some difficulty finding information on two norwegian ancestors. Any help would be so appreciated! My family tells me they have been researching this since the 70s (no one actually having the means to travel to Norway). First, my great great grandmother, Olga Justine Overson/Oversdatter. * Birth 23 NOV 1884 in Norway (unsure where) * Dark hair, dark skin * Had a child Jenny, born in 1901 in Namdalseid (?) Norway * Family members say the name Kolbal had been associated with her name * Immigrated around 1906 per multiple census records. Unsure if she immigrated with her child Jenny or if Jenny came over at a later time (Jenny's children were born in Canada) * Married Christ Satter 11/25/1907 in Minnesota, US and had many children. Passed away in 1966 in Wisconsin, US * Many in the family think that she was Sami/Laplander. Would love to confirm that Second, my great great grandfather, Christefer Christensen Sather (american name Christ Satter), born July 1874 in Romsdalen, Norway (not confirmed) * Immigrated to the US around 1892 per multiple census records * Naturalized in Buffalo, Wright County, Minnesota, US on September 7th, 1904 as Christopher Satter * First married to Martha Satter (1869-1907) who was from Sweden, then married Olga (above) * Died 1961 in Wisconsin, US