In the church records of the New Goshenhoppen Reformed Church (1731-1833 (now in East Greenville,Montgomery Co., PA), I found the burial records for Anna Margaretha Danckel (Dunkle). Some say that her maiden name was Diehl. She was supposedly married to Jacob Dunkle. They came to America in the early 1700s from Rheiland-Pfalz (Palatinate) in Germany. Anyway,she was born on Feb. 10, 1696 and died on April 18, 1771; aged 75 years, 2 months., 5 days.
One person on Ancestry.com said that the Dunkles had been married for over 55 years, which would make the marriage date around 1715 or 1716, if this is true.