Mary Op Den Graeff 
Mary Op was born in 1643 in Kriegsheim, Palatinate, Pfalz, Germany. She died after 1670 in Pennsylvania.General Notes
Some sources list her birth in 1656.
‌Mary Op and Johannes Peter were married in a religious ceremony on December 20th, 1686 in Germany. They had a daughter named Elizabeth.
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Children
Elizabeth Cassell
Elizabeth was born in 1672 in Kresheim, Germany. She died in Germantown, Montgomery or Philadelphia County, Pennsylvania.
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