Hemmestveit

I am looking for information about Torjus Hemmestveit, his brother Halvor Hemmestveit, and his sister Aasne Hemmestveit. In particular I am interested in information about Aasne. She was born in Morgedal, Norway in 1865, and died in 1921. I believe she married a person by the name of Ramstad and settled in Ada Minnesota, and I would like to know if she had children, who they were and if anyone of them are still alive. Torjus, Halvor, and Aasne came over to Minnesota around 1880-1895, together with Mikkel Hemmestveit and Birgit Hemmestveit, another brother and sister. Birgit also remained in Minnesota, but Mikkel went back to Norway. I have tried hard to find anyone of them on passenger lists but have not succeeded. Perhaps they did not use the Hemmestveit name in the US? Asle Sudboe