David,& All your partly right, and partly wrong...Yes Margaret(Unk) Moyer was the widow of John Moyer d: 1793, in Bethel Twp. Berks, PA...she married 2nd Martin Shuey S/O Daniel bet 1793-95 (I assume) as Martin's will was written 1795 and probated 1801...and Margaret is mentioned in the will, from an Article in Ohio, someone got the idea that her son's John and Phillup Moyer both married: Shuey dau's of Martin..
a Johannes Meier md: Margaret Eliz Shui d/o Martin Shuy 1 Apr 1788, Christ Luthern Church, Stouchburg....this could be Margaret Moyer's son John ???(no proof)
But her son Phillup Moyer, married Ester Kline, per his Will in 1796, he named his dau Elizabeth , giving her all his share from his Father John's Moyer estate
there is another Phillup Moyer of Bethel Twp. S/o Peter Moyer however, he died 1819, named wife Catherine...he also had a brother John....these could be the ones who married the two Shuey Dau's of Martin