George Mattern/Catharina Schrupp had a son named George Mattern who was born on Jan 30, 1765 in near Hagerstown, MD; died June 9,1834 in Huntingdon Co. PA.He married Catherine Hyskell on May 23, 1791 and he is my great, great, (not sure how many "greats") granddad. After my father's death (george perry green mattern) and my mother's recent death (Minnie Claretta Mattern), I re-searched my tree & have found records from now, back to George and Catherine Schrupp's parents. I also discovered there is a "Mattern Family" bible kept in the Huntingdon County Historical Society in PA. and we hope to visit there, this summer. If I go over my paperwork, I might find the brothers and sisters you are trying to locate.Please email me so I can reply to you, for it took me hours to find this site. Gail Mattern (Munter) PS:I live in a suburb of Buffalo, NY.