| Geert DE WINTER (1852 - 1935) |
|
| Hendrika HOMMERICH (1855 - 1952) |
| Jochem Jan KOOPMANS Prof. Dr. | Margaretha DE WINTER |
| bd. 24 Nov 1886, Heerjansdam, NL occ. Me. rel. dd. 14 Apr 1963, Bilthoven, NL brd. |
bd. 24 Jun 1887, Amsterdam, Noord-Holland, NL occ. Me. rel. dd. 30 Mar 1975, Amstelveen, NL brd. |
| Jacob Hendrik KOOPMANS Dr. Geert KOOPMANS P. Eng. |