Family |
Neeltje Leentje Bak, b. 23 May 1879, Schiebroek, Zuid-Holland, Netherlands , d. 12 Mar 1966, Rotterdam, Zuid-Holland, Netherlands (Age 86 years) |
Children |
| 1. Willem Koolhaas, b. 27 Jan 1909, Rotterdam, Zuid-Holland, Netherlands , d. Yes, date unknown |
| 2. Jacoba Petronella Koolhaas, b. 23 Mar 1910, Rotterdam, Zuid-Holland, Netherlands , d. Yes, date unknown |
| 3. Leendert Koolhaas, b. 22 Jun 1911, Rotterdam, Zuid-Holland, Netherlands , d. 23 Apr 1968, Gouda, Zuid Holland, Netherlands (Age 56 years) |
| 4. Petronella Maria Koolhaas, b. 6 May 1913, Rotterdam, Zuid-Holland, Netherlands , d. Yes, date unknown |
| 5. Willemijntje Koolhaas, b. 25 Jun 1914, Rotterdam, Zuid-Holland, Netherlands , d. 24 Aug 1998, Barendrecht, Zuid-Holland, Netherlands (Age 84 years) |
| 6. Jan Koolhaas, b. 27 Oct 1915, Rotterdam, Zuid-Holland, Netherlands , d. Yes, date unknown |
| 7. Adriana Maria Koolhaas, b. 30 Mar 1918, Rotterdam, Zuid-Holland, Netherlands , d. Yes, date unknown |
| 8. Geertruida Anna Koolhaas, b. 19 Sep 1920, Rotterdam, Zuid-Holland, Netherlands , d. Yes, date unknown |
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