Your Bartholomew M. Barrickman may descend from Peter Barrickman (birth name Georg Peter Bergmann). He was born 1776 in Germany. He lived in PA, MD, and IN. He died between 26 Jan and 8 Sep 1791, Vincennes, Knox Co., IN. There is a will. He was married twice and had 17 children. I descend from Peter's son Michael who went back to PA.