Even Andersen(b 1804 Norway) and family

My great great grandfather had a brother: Even Andersen Koljorde, born about 1804 in Slidre, Oppland, Norway. He still lived At the home farm in the 1865 census together with his mother Ambjorg [1779], his wife Berit Olsdtr [1815] and his two children Anders [1843] and Ambjorg [1850]. Even, Berit and the daughter Ambjørg emigrated March 25 1867 heading for America. I can not find any tracks of them after this, so what happend to them? Also the son Anders leaves no tracks after the 1865 census as far as I can see. Help would be nice.