| Father | | Hemke van der Zwaag  (I13198) 
Birth  20 June 1899   -- Dantumadeel, Datumadeel, Friesland, NetherlandsDeath  22 January 1990 (Age 90)   -- Hoogeveen, Hoogeveen, Drenthe, Netherlands
 
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				| Mother | | Frederika de Graaf  (I13197) 
Birth  5 October 1901   -- Gramsbergen, Hardenberg, Overijssel, NetherlandsDeath  14 June 1992 (Age 90)   -- Hoogeveen, Hoogeveen, Drenthe, Netherlands
 
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				|  | | Kasper van der Zwaag  (I22422) 
Birth  1926   -- Oosterhesselen, Coevorden, Drenthe, NetherlandsDeath  28 July 1943 (Age 17)   -- Groningen, Groningen, Groningen, Netherlands
 
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