| | Johann Heinrich Friedrich Oelker 1814–… | | | | Johann Hermann Heinrich Oelker 1771–1854 Engel Marie Catherine Jacobus 1777–1842 | | | | Johann Heinrich Oelker 1742–1810 Cathrine Marie Growen 1746–… | | | | Marie Catherine Remmers 1720–… |
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| | | Ernst Friedrich Jacobus 1752–… Ilse Dorothea Wulf 1755–… |
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