| Children of Margaret Syllys Pletgens and Hermans Isaaks Op Den Graf are:
| | i. | Hester Op Den Graf was born 18 JAN 1608/9 in Krefield, Germany, and died 1643 in Krefield, Germany. She married Isaak Jacobs Van Bebber.
He was born ABT 1610 in Krefield, Germany.
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| 2. | ii. | Isaac Hermanis Op Den Graeff was born 28 DEC 1615 in Krefeld, Westphalia, Germany, and died 16 JAN 1678/9 in Germany. He married Greitgen Porteis ABT 1636 in Germany.
She was born 1620 in Krefeld, Westphalia, Germany.
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| | iii. | Isaak Op Den Graf was born 1 SEP 1616 in Krefield, Germany, and died 17 JAN 1668/9 in Krefield, Germany. He married Margaret Johnson AFT 1636, daughter of Peter Janson.
She was born ABT 1620 in Krefield, Germany, and died 11 NOV 1683 in Philadelphia, Philadelphia County, Pennsylvania.
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