Mobeck, Olsen, Vik, Rood from Nes Romerike

I'm looking for any ancestors with the surnames Mobeck, Olsen, Vik or Rood from the Askershus area. My grandfather, Lars K. Vik and his brother, Knute Vik, came over to the U.S. approximately 1900 or 01 on the Norge from Kristiana. Lars K. Vik dob was 10/22/1884. Their father's name was Knut Vik, and I believe they may have had two sisters. I have no other information about the family they left behind in Norway. I'm also looking for an ancestor named Osgim or Asgrim Rood/Ruud/Rud, who apparently has an interesting history. He spent his money foolishly, and then decided to burn his farm buildings down and collect the insurance money to pay his debts. His crime was discovered and he was thrown in prison. In the meantime, his wife, Helga, and his children, including Syvert Rood/Ruud/Rud (my great-grandfather) came to the U.S. to Hatton, North Dakota, where Helga stayed with her brother, Ole Berg until Osgim was released from prison and sent to the U.S. The Edward and Berthe Maria Mobeck family also came from Akershus, Nes Romerike, from the Holter farm and Mobekk area??? They also settled in the Hatton, North Dakota area. Any information would be greatly appreciated!