Isaac Hermans op den Graeff, was born on February 22 in 1616 in Krefeld, Germany. He married Margaretha ‘Grietgen’ Peters/Doors around 1643 and they converted to Quakerism in 1679/80 with his entire family. Isaac emigrated to Philadelphia on The Concord with his wife and three sons, Herman Isaacs, Derick Isaacs and Abraham Isaacs (our 9th great grandfather), arriving on October 6th in 1683. Isaac’s wife Grietgen died within a month after their arrival, on November 11, 1683, in Philadelphia.
This Isaacs op den Graeff family was included in the first thirteen families that settled and founded Germantown. On a potentially negative note, it is thought in some lines of the family, Isaac Hermans Op den Graeff became the ancestor of all who bear the Op den Graeff name in this country, along with their legendary temperament and potential mental health problems. These problems could have come from either the op den Graeff or the Peters/Doors family lines, or both.
The writing of Isaac’s bio, and actually those of all of the op den Graeff family, is difficult to sort through. What is myth and what is fact? Researching this person and family can be related to untangling a ball of knotted up string, with intermarriage, convoluted naming schemes, potential – but not certain – royal ancestry, and poorly written histories.
How we are related to Isaac Hermans Op Den Graeff and his son:
Isaac Hermans Op Den Graeff (1616 – 1679) is my 10th great grandfather
Abraham Isaacs Op Den Graeff (1649 – 1731) Son of Isaac Hermans
Gertien Op Den Graeff (1681 – 1725) Daughter of Abraham Isaacs
Anna Adams/Addams (1714 – 1794) Daughter of Gertien
Jacob Adam Umstead (1745 – 1817) Son of Anna
Joel Tyson Umstead (1783 – 1870) Son of Jacob Adam
Reverand Richard Hunsberger Umstead (1821 – 1895) Son of Joel Tyson
Sarah Ann Umpstead (1846 – ) Daughter of Reverand Richard Hunsberger
Sarah A. Dunbar (1873 – 1940) Daughter of Sarah Ann
Alberta Claire Oesterling (1893 – 1976) Daughter of Sarah A.
The Concord left the Thames harbor at Gravesend on July 24th, 1683 and after an arduous two and one-half month journey, arrived safely in Philadelphia on October 6th, 1683. The ship carried 40 crewmen and 120 passengers. From — Global Anabaptist Mennonite Encyclopedia Online
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Reference: Villandra’s files on rootsweb