The Johnson Brothers from Norway

In 1894, three brothers from Norway emigrated to the US from the farm Bjørgjo on Halsnøy. The brothers were named Bernt Johan (John Johnson, 14. feb 1870 - 22. apr 1945), Sjur (Severt Johnson, 11. mar 1872 - 26. may 1950) and Jon (John O. Johnson, 07. apr 1875 - 20. may 1968), and all moved to Minnesota, where they married and had children. Now, I am currently working on a large family tree for my family, and this branch of the family remains empty, as I have been unable to find more information than the names and dates of birth of their children. So I am now wondering, does anyone here have knowledge of this family? The three brothers were first cousins of my great-grandfather, Lars Bjørgen (1890-1968). In advance, thanks for all your help! kind regards, Christian