A. Blömer, Ahnenliste der Geschwister Wienandts zu Rheydt, Mönchengladbach 1984, S. 4
____________________ | Johann Jost WOLFFERTS |____________________ | (....-1781)x1759 Peter Caspar WOLFFERTS | ____________________ | (1759-1819)x1781 | | | | Maria Katharina BECKHAUS |____________________ | x1759 Carl Abraham WOLFERTS | ____________________ | (1801-1863)x1834 | | | | ___________________________|____________________ | | | | | Maria Gertrud JOHANN | ____________________ | (1760-....)x1781 | | | |___________________________|____________________ |--Wilhelmina Elisabeth WOLFERTS | (1835-1867)x1860 Adolf SCHUMACHER > | | x1697 | Wilhelm SCHUMACHER | Gertrud ARNTZ | | (1710-1778)x1743 (....-1715) | Johann Peter SCHUMACHER | ____________________ | | (1747-1834)x1787 | | | | | Anna Margaretha WILMS |____________________ | | (1723-1790)x1743 | Maria Elisabeth SCHUMACHER | ____________________ (1799-1842)x1834 | | | Wilhelm FRÖHLEN |____________________ | | (1723-1801)x1759 | Anna Katharina FRÖHLEN | (1762-1802)x1787 | Heinrich POSTHAUS > | | (1693-1753)x1725 | Anna Katharina POSTHAUS | Agnes HAMACHER > (1737-1770)x1759 (1696-1761)