Thanks for the information. I would like to update what I have so far. The Jacob Probasco that married Katrina Van Sickelen was b. 1747. I actually believe they had a son before George named Samuel b. abt 1774-5. I know that makes Katrina a young mother but that sometimes happened. Or she was baptized quite awhile after she was born. I believe the family moved to VA around 1796. I have accounted for all of the other Jacob Probascos living at that time, so it seems it would have to be Jacob and Katrina. In 1796 he is listed in the Loudoun county, VA tax list with son Samuel. Son George shows up with Jacob in 1799.