| | Jan ten Doornkaat Koolman 1850– Maria Margarethe Berends 1851– | | |
Hermann ten Doornkaat Koolman 1857–1908 | | |
Jacobus ten Doornkaat Koolman 1859– | | |
| | Friederike Caroline Hitjer 1823–1905 Fiepko ten Doornkaat Koolman 1817–1876 | | |
| | Heinrich Johann Hitjer 1798–1843 Grieta Jacobina Tamling 1797–1833 |
