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Lazarus Philippus Koekkoek, birth 11 May 1902 Groningen, Groningen, Nederland, died 11 Jun 1943 Sobibor, Biala Podleska, Polen, son of Philippus Koekkoek and Betje van Gelder
to:
Betje Simmeren, birth 27 Apr 1908 Groningen, Groningen, Nederland, died 11 Jun 1943 Sobibor, Biala Podleska, Polen, daughter of Levie Simmeren and Rebekka Levie |
| 1) Philippus Koekkoek, birth 28 Jan 1939 Groningen, Groningen, Nederland, died 11 Jun 1943 Sobibor, Biala Podleska, Polen |