| 1. Robertus Henderikus Kostermans, b. Mon 26 Jan 1891, Assen, Drenthe, Nederland d. Yes, date unknown ▻ Elisabeth Magretha Cusiel, m. Thu 15 Apr 1920 | | 2. Margaretha Anna Kostermans, b. Fri 09 Sep 1892, Assen, Drenthe, Nederland d. Yes, date unknown ▻ Gerhardus Albertus Burgman, m. Mon 05 Sep 1921 | | 3. Anna Elisabeth Kostermans, b. Sun 08 Oct 1893, Assen, Drenthe, Nederland d. Yes, date unknown | | 4. Henderikus Franciscus Kostermans, b. Tue 26 Mar 1895, Assen, Drenthe, Nederland d. Fri 12 Feb 1926, Assen, Drenthe, Nederland (Age 30 years) | | 5. Hendri Petrus Kostermans, b. Mon 28 Sep 1896, Assen, Drenthe, Nederland d. Yes, date unknown | | 6. Franciscus Josephus Kostermans, b. Sun 14 Oct 1900, Assen, Drenthe, Nederland d. Fri 24 Mar 1944, Boekel, Noord-Brabant, Nederland (Age 43 years) | | 7. Petronella Dorothea Kostermans, b. Sun 27 Oct 1901, Assen, Drenthe, Nederland d. Yes, date unknown | | 8. Susanna Maria Kostermans, b. Jan 1907, Assen, Drenthe, Nederland d. Sat 28 Sep 1907, Assen, Drenthe, Nederland (Age 0 years) | |