Genealogisches Register der Heydweillerschen Familie, Krefeld 1890, S. 54
O. von Beckerath, Familie von Beckerath II, Krefeld 1936, S. 30
♥ = Vorfahren ___________________________________ | _______________________________|___________________________________ | _______________________________| ___________________________________ | | | | |_______________________________|___________________________________ | Johann Wilhelm von BOETZELAER | ___________________________________ | (1848-1939)x1878 | | | | _______________________________|___________________________________ | | | | |_______________________________| ___________________________________ | | | | |_______________________________|___________________________________ |--Elsa Theodora Amalia von BOETZELAER | (1880-1969)x1900 Johann Valentin HEYDWEILLER > | | (1734-1795)x1770 | Jakob Benjamin HEYDWEILLER | Friederika Wilhelmina KALL > | | (1787-1836)x1819 (1748-1818) | Hermann Valentin HEYDWEILLER | | | (1820-1872)x1853 | Gerhard HUNZINGER > | | | | (1764-1815)x1794 | | | Amalia HUNZINGER | Maria Theresia BUSCH > | | (1795-1863)x1819 (1768-....) | Johanna Luisa HEYDWEILLER | (1857-1919)x1878 | Friedrich Heinrich von der LEYEN > ♥ | | (1765-1842)x1791 | Konrad Wilhelm von der LEYEN | Susanna Luisa Maria HOFFMANN > ♥ | | (1792-1873)x1824 (1774-1817) | Johanna von der LEYEN | (1830-1875)x1853 | Jacob Friedrich GONTARD > | | (1761-1843)x1787 | Sophia GONTARD | Amalia Sophia WICHELHAUSEN > (1800-1831)x1824 (1769-1831)