J.V. Bredt, Geschichte der Familie Siebel, Marburg 1937, S. 104
Johann Peter de LANDAS >
| (1703-1768)x1724
Johann Caspar de LANDAS | Helena Katharina SCHLÖSSER >
| (1732-1802)x1760 (1697-1783)
Friedrich Wilhelm de LANDAS |
| (1763-1805)x1790 | Jakob SCHLÖSSER >
| | | (1701-1770)x1734
| | Anna Katharina Gertrud SCHLÖSSER | Maria Gertrud JÖRGENS >
| (1735-1799)x1760 (1705-1746)
Johann Friedrich de LANDAS |
| (1799-1861)x1823 | Johann Peter PIEPER >
| | | (1697-1786)x1724
| | Johann Heinrich PIEPER | Sibylla an der BIBELSKIRCHEN >
| | | (1736-....)x1760 (1703-1747)
| | Sara Wilhelmina PIEPER |
| (1772-1857)x1790 | Johann Abraham SOMBART >
| | | (1713-1761)x1736
| | Maria SOMBART | Gertrud DÜMPTERMANN >
| (1742-1799)x1760 (1716-....)
|--Julia de LANDAS
| (1840-1915)x1859 Friedrich BREDT >
| | (1724-1771)x1754
| Johann Peter BREDT | Anna Christina Wilhelmina WICHELHAUS >
| | (1756-1819)x1781 (1730-1768)
| Johann Peter BREDT |
| | (1782-1852)x1804 | Peter Caspar WORTMANN >
| | | | (1705-1766)x1752
| | | Charlotte Wilhelmina WORTMANN | Anna Maria FROWEIN >
| | (1762-1816)x1781 (1729-1797)
| Julia BREDT |
(1805-1872)x1823 | Johann Wilhelm SIEBEL >
| | (1709-1776)x1731
| Karl Jakob SIEBEL | Anna Margaretha EVERTSEN >
| | (1747-1786)x1778 (1711-1765)
| Charlotte Wilhelmina SIEBEL |
(1785-1864)x1804 | Peter Caspar WORTMANN >
| | (1705-1766)x1752
| Maria Christina WORTMANN | Anna Maria FROWEIN >
(1758-1796)x1778 (1729-1797)