Bingo! I am a descendant of Barbara Sinn and Andrew Michael. Their son William Michael (abt 1762 - 1826) was married to Barbara Beckenbach. I have Barbara Sinns father as Henrich Johann Sinn and Catharina ?.
I am descended from Andrew Michael, then John Michael & Deborah Jefferson (cousin of Thomas Jefferson), then Oliver Michael & Mary Stewart, then Milo Michael & Eliza Reed, then Garth Michael & Kathryn Campbell.