Hi Betty. I have a genealogical data concerning Matthias Achenbach and his descendents. I have 1 question concerning your lineage though. Church records show Anna Maria Achenbach (b. 1762; bp 18 Feb 1762 by Rev John Waldschmidt) m. John George Brunner (not George Peter). They were married 12 Feb 1782 by Rev Waldschmidt. John George Brunner (b. 20 May 1754 E. Cocalico twp., Lancaster County, PA; bp. 2 June 1754 Muddy Creek Reformed Church, East Cocalico, Lancaster County). John George did have a brothet John Peter Brunner who married Anna Maria's sister Eva Achenbach, but they didn't leave Lancaster County and I also have their dates and burial location. I have John George and Anna Maria having 6 children from the church records: Elizabeth (19 Dec 1782), Barbara (10 May 1784), Anna Maria (3 Feb 1786), John (31 July 1794), Eva (23 Feb 1797) and Lea (22 Feb 1800). From the dates, there could have been other siblings. You can email me directly if you would like the rest of the data that I have. Hope this helps.