| | Harm Derks Holthuis 1755–1830 Anna Hinderika Fokkes 1760–1836 | | |
Catharina (Trijntje) Derks (= Holthuis) 1757–1797 | | |
Jantje Derks (= Holthuis) 1762–1839 Wijnke Jans Bijlholt 1758–1817 | | |
Anna Derks (= Holthuis) 1764– Jacobus Aloysius Schmeltz 1749–1819 | | |
| | Susanna Derks (= Holthuis) 1766–1824 Hendrik Engberts Bolder –1791 Engbert Wubbelts 1763–1850 | | |
| | Maria Derks (= Holthuis) 1768–1842 Theodoor (Derk) Jans Zwart 1761–1822 | | |
| | Derk Harms (= Holthuis) 1725–1787 | | |