A. Blömer, Die Erbförsterfamilie Nickel zu Gressenich, Mönchengladbach 1986, S. 114
_______________________ | _____________________|_______________________ | ____________________________| _______________________ | | | | |_____________________|_______________________ | Johann Andreas WITTIGEN | _______________________ | x1744 | | | | _____________________|_______________________ | | | | |____________________________| _______________________ | | | | |_____________________|_______________________ |--Maria Magdalena WITTIGEN | (1752-....)x1783 _______________________ | | | Wilhelm WELTER |_______________________ | | x1687 | Arnold WELTER | _______________________ | | (1687-....)x1721 | | | | | Agnes SAUERBIER |_______________________ | | x1687 | Lucia WELTER | (1723-....)x1744 | Christoph SCHLÖSSER | | | Matthias SCHLÖSSER | Anna SCHRÖDER | | x1673 | Maria Katharina SCHLÖSSER | (1695-....)x1721 | Matthias SAUERBIER | | x1650 | Lucia SAUERBIER | Margaretha OFFERMANN (1650-....)x1673