I came across something on Google Books that may be of interest. I'm not sure if someone has pointed this out before, and if they did my apologies. It is a series of papers presented in the 1920's to the Lancaster County, PA Historical Society. One of the papers that caught my interest was a series of petitions from 1785 signed by residents of what was later Dauphin, Lebanon and Lancaster Counties. The list contains about 1000 names, and those who signed their name in German are designated. There is also a two part paper on the settlement of Augusta County, VA by Lancaster County residents based on their names being listed in various Virginia legal documents. Augusta County included what is now Rockingham County. It includes notes on the Dunker's, although they state the first Dunker's came there in the 1780's. The title in Google is "Papers Read Before the Lancaster County Historical Society" Bill Thomas