Nels and Martin Bestul

I'm looking for information on Nels and Martin Bestul. Nels is the father and he was born in 1829 and he's from Norway. His son is Martin Bestul and he was born in wisconsin. Nels is listed on a 1870 census as living in Scandinavia, Waupaca, Wisconsin and Martin is listed in a 1910 census as living in Alban, Portage County, Wisconsin.