Do you have dates on Peter and Catherine? By chance did they move on to Ohio or stay in PA? What of their children? This is a long shot but since I do not know where my Piffers came from... perhaps PA? I have a son William E. born abt 1861 (he married in 1884 and had 2 daughters right soon after in Miami co. OH. A Catharine Piffer is buried with William and his wife and young daughter. Catharine would be of the right age to be his mother. The Ohio Piffer/Pifer do not seem to have him in their family.