Johan Hermann Diederich GERDTKEN 1767–1832 Margaretha Elsabein VÖLKERS – | | |
Hermann Joachim GEHRKEN 1771–1827 | | |
Herman Friederich GERDTKEN 1776– | | |
| | Catharina Margaretha SCHWIETERS – Jochaim (Joachim) GERDTKEN 1739– | | | | Herman Jochem (Joachim) GERDTKEN 1702– | | | | Herman BRAMSCHEN gnt. GERDTKEN (GERDES) – | | |
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