I am looking for more information on my grandfather Harry John Olson, brother of Russell Olson, father of Dennis Applegate, Debbie Applegate, Kathy Applegate, and Clarence John "CJ" Olson. At one point he was married to Patricia Joy Bjermeland, my grandmother. I was adopted by Kay (Bjermeland) Vallejo, sister of Patricia (Bjermeland) Applegate. Harry's daugther Debbie is my biological mother. I am specifically looking for information on his father and his father's ancestors.