R. Rocholl, Geschichte des Geschlechts Rocholl aus Radevormwald, Berlin 1938, S. 125 (VIII 47b)
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Heinrich Philipp POTTHOFF | __
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|--Augusta POTTHOFF
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| Jobst Heinrich SIEKMANN |__
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| Rudolf Heinrich SIEKMANN | __
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| | | Margaretha Elisabeth KNEMEYER |__
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| Katharina Luisa Wilhelmina SIEKMANN | __
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| Johann Simon SCHWARZ |__
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| Henriette Luise SCHWARZ | __
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| Katharina Margaretha GARDTEN |__