M. Strutz-Ködel, Bergisches Geschlechterbuch 5 (DGB 183), Görlitz 1980, S. 51
J. Gruch, Die evangelischen Pfarrerinnen und Pfarrer im Rheinland IV, Bonn 2020, Nr. 14746
___________________ | ___________________|___________________ | Johann Wilhelm THOMAS | ___________________ | | | | |___________________|___________________ | Johann Peter THOMAS | ___________________ | x1766 | | | | ___________________|___________________ | | | | | N. | ___________________ | | | | |___________________|___________________ |--Katharina Margaretha THOMAS | (1773-1837)x1794 Adolf SIEBEL > | | (1640-1696)x1670 | Peter SIEBEL | Margaretha BRAß > | | (1682-1741)x1712 (1650-1728) | Heinrich Wilhelm SIEBEL | ___________________ | | (1713-1786)x1735 | | | | | Katharina KOHL |___________________ | | (....-1748)x1712 | Katharina Margaretha SIEBEL | ___________________ (1745-....)x1766 | | | Johannes ESGEN |___________________ | | x1704 | Anna Margaretha ESGEN | ___________________ (1704-1772)x1735 | | | N. |___________________ x1704