Looking for the Paulson Family

Hi I'm looking for any information anyone has on the Paulson Family. My Great Great Grandpa is Knute Paulson. I believe they emigrated to America from Trondhem, Norway in the late mid 1800's. His wife's name is Bertha, and I believe they had around 8 children. I have a family picture of them, but I have no idea who they are. I have no older family members to ask, who would know about them. Please help my find some information on my family. Thanks, John Paulson