A connection between descendants of Nathaniel Redd, b.1749 and a descendant of the German Andreas Roth (Andrew Redd) d. 1819, Frederick Co, VA. has been proven through DNA testing. This link will take you to the Redd DNA project webpage. Paste it in your browser. http://www.familytreedna.com/public/reddfamilyhistoryydnaproject/
A click there on Y RESULTS at the top of page will take your to the test results page. The blue group is ours. In a nutshell, what it means is that there was a nearly perfect match between 2 testers who are proven descendants of Nathaniel. The third tester who matches descends from the German Andreas Roth. The exact connection between Nathaniel, b. 1749 and Andrew Redd (Andreas Roth) is unknown at present, possibly brothers, cousins or something. It answers the old question of German or English for Nathaniel Redd descendants. Any information you might have that is related to either of these Redd lines may help nail this down once and for all.