Willem Ertwin Frederik van Heemskerck
| Family | Pedigree | Reports |
| Willem Ertwin Frederik van Heemskerck |
| b. 8 Apr 1854 |
| d. 24 Sep 1893 |
| Willem Ertwin Fredrik van Heemskerck |
| b. 10 Jul 1824 |
| d. 20 May 1880 |
| Engekende Ni Ho |
| b. |
| d. |
| Family | Pedigree | Reports |
| Willem Ertwin Frederik van Heemskerck |
| b. 8 Apr 1854 |
| d. 24 Sep 1893 |
| Willem Ertwin Fredrik van Heemskerck |
| b. 10 Jul 1824 |
| d. 20 May 1880 |
| Engekende Ni Ho |
| b. |
| d. |