A. Blömer, Die Abstammung der Catharina Lindgens (* 1762 in Hoppers), Mönchengladbach 1998, S. 18
__ | __|__ | ___________________| __ | | | | |__|__ | Görd HAMACHER | __ | (1625-....)x1650 | | | | __|__ | | | | |___________________| __ | | | | |__|__ |--Katharina HAMACHER | (1654-....) __ | | | __|__ | | | Peter SCHIFFERS | __ | | (....-1658)x1630 | | | | |__|__ | | | Christina SCHIFFERS | __ (1631-....)x1650 | | | __|__ | | | Katharina MÜLLER | __ (....-1658)x1630 | | |__|__