| Ancestry Chart: | 
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 Family with spouse
 Gerrit Zielstra
 Roelfien Zielstra- Johanna Mulder  (I03319) Birth 10 May 1893 -- Gieten, Aa en Hunze, Drenthe, Netherlands (I03319) Birth 10 May 1893 -- Gieten, Aa en Hunze, Drenthe, Netherlands
 Death 24 December 1979 (Age 86) -- Groningen, Groningen, Groningen, Netherlands
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