Willem Frederik Keijser 1880–1967 Jeanne Charlotte Lans 1887– | | | | Charlotte Louise Polack 1864–1896 | | | | Carel Frederick Willem Lans 1837–1896 Constance Emelie Soetens 1847–1917 | | | | Jan Cornelis Lans 1788–1853 Albertina Christina Michielse 1794–1819 Leolinda Elizabeth Fransz 1792–1876 | | | | Johannes Petrus Lans 1762–1805 | | |
| | | Cornelia Veerenfelt 1769– |
| | | Nicolaas Cornelis Fransz 1745–1795 Maria Christina Pfefferkorn 1758–1817 | | |
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