
| Pieter Jacobus Post van der Steur | |
| B: | 29 Apr 1871 |
| Haarlem, North Holland, Netherlands | |
| D: | 17 Jan 1960 |
| The Hague, 's-Gravenhage, South Holland, Netherlands | |
| Alida Engelina de Brauw | |
| B: | 13 Jun 1885 |
| Breda, North Brabant, Netherlands | |
| M: | 27 Sep 1921 |
| 's-Gravenhage, South Holland, Netherlands | |
| D: | 1 Nov 1970 |
| Zeist, Utrecht, Netherlands | |
| Alida Jacomina van der Steur | |
| B: | 15 Dec 1836 |
| Haarlem, Noord-Holland, Nederland | |
| D: | Yes, date unknown |
| Adrianus Post | |
| M: | 7 Aug 1862 |
| Haarlem, Noord-Holland, Netherlands | |
| D: | Yes, date unknown |