My grandpa was John Petersen Dall born 9/7/1871, I think in the US. He lived most of his life around Omaha NE. He was married to Nicolena Simonsen (German). They had 11 children. My mother was Adeline Helle born 4/28/1912.I know his father was Thomas. They are buried at Mount Hope cemetary in Omaha. Does anyone have any idea about anyone back farther than this.