Ole Olsen Thon

I am trying to find information on by great grandfather who was from Etnedal, Valdres Norway. He was born on 1-6-1836 and married Anne Erickson who was born on 9-24-1849. Anne's parents were Guri and Haldor Erickson and her grandfather was Amund Julsen Steinset. From what I know Ole and annie had two children in Norway, Olianna, born 11-24-1868 and Henry, born 8-8-1870 and emigrated to the United States in 1873. First to Glencoe MN, the Mayville Portland ND, and finally settled near Harvey, North Dakota. More children including my grandfather were born in the United States. Any information on Ole would be greatly appreciated.