H. Strehlau / M. Strutz-Ködel, Bergisches Geschlechterbuch 4 (DGB 168), Limburg/Lahn 1974, S. 226
___________________ | Johann Peter LÜDORFF |___________________ | x1765 Johann Daniel LÜDORFF | | (1774-....)x1799 | Johann Peter VOß | | | | | Maria Gertrud VOß | N. | x1765 Peter Daniel LÜDORFF | ___________________ | (1804-1887) | | | | ___________________________________|___________________ | | | | | Anna Katharina RATH | ___________________ | x1799 | | | |___________________________________|___________________ |--Johanna Wilhelmina LÜDORFF | (1833-1891)x1858 ___________________ | | | Johann Caspar BERGMANN |___________________ | | x1758 | Johann Peter BERGMANN | ___________________ | | (1768-1838) | | | | | Anna Christina Elisabeth THEIßEN |___________________ | | x1758 | Johanna Wilhelmina BERGMANN | ___________________ (1806-1871) | | | Johann Peter Caspar SPIECKER |___________________ | | x1773 | Anna Maria SPIECKER | ___________________ (1775-1853) | | | Anna Katharina KUNENDAHL |___________________ x1773