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 Family with spouse
 Frederika de Graaf
 Kasper van der Zwaag- Hemke van der Zwaag  (I13198) Birth 20 June 1899 -- Dantumadeel, Datumadeel, Friesland, Netherlands (I13198) Birth 20 June 1899 -- Dantumadeel, Datumadeel, Friesland, Netherlands
 Death 22 January 1990 (Age 90) -- Hoogeveen, Hoogeveen, Drenthe, Netherlands
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