Children |
| 1. Johannes Wilhelmus Koch , b. 06 Aug 1879, Oosterdiep, Veendam, Groningen , d. Yes, date unknown |
| 2. Harmannus Koch , b. 10 Feb 1881, Veendam, Groningen , d. 14 May 1945 (Age 64 years) |
+ | 3. Jantje Koch , b. 26 Dec 1882, Veendam, Groningen , d. 17 Dec 1958, Veendam, Groningen (Age 75 years) |
| 4. Andreas Daniel Koch , b. 03 Dec 1884, Oosterdiep, Veendam, Groningen , d. 14 May 1974, Ter Apel, Vlagtwedde, Groningen (Age 89 years) |
+ | 5. Lammechien Koch , b. 29 Mar 1887, Veendam, Groningen , d. 05 Oct 1961, Hoogezand-Sappemeer, Groningen (Age 74 years) |
| 6. Hinderkien Koch , b. 04 Sep 1889, Oosterdiep, Veendam, Groningen , d. Yes, date unknown |
+ | 7. Annechien Koch , b. 08 Oct 1891, Oosterdiep, Veendam, Groningen , d. 29 Mar 1984, Amsterdam, Noord-Holland (Age 92 years) |
| 8. Luchina Koch , b. 04 May 1893, Veendam, Groningen , d. 11 May 1893, Veendam, Groningen (Age 0 years) |
| 9. Jakob Koch , b. 04 May 1893, Veendam, Groningen , d. 31 May 1893, Veendam, Groningen (Age 0 years) |
| 10. Luchina Koch , b. 18 Apr 1894, Veendam, Groningen , d. Yes, date unknown |
| 11. Jakob Koch , b. 01 May 1896, Veendam, Groningen , d. Yes, date unknown |
| 12. Margaretha Kristina Koch , b. 18 Feb 1898, Veendam, Groningen , d. Yes, date unknown |
|