From the information I have here in Indiana County, PA, Johannes Georg Knauff b abt 1788 married to Kunigunda Bishop had at least two sons, John b 12/16/1811 who Married Anna Barbara Drietz. They had a son John b 1/30/1847 who married Mary Ellen Vandervork. Johannes and Kunigunda also had a son Michael who married Louisa???. Michael and Louisa had at least three sons, Michael, Henry and Hartman. A brother of John b 1/30/1847 named David b 2/10/1851 married to Mary A. Heitzenrater had a son John A. b Oct 11, 1875. He married Anna Wilda Lyke. Don't know if this helps, have more information. Chuck Bollinger