1. | Gradus Zwienenberg was born on 31 augustus 1908 in Arnhem; died on 1 maart 1978 in Arnhem; was buried on 6 maart 1978 in Arnhem. Family/Spouse: Fennigje Heideveld. Fennigje was born in 1907. [Group Sheet] [Family Chart]
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2. | Johan Richard Zwienenberg (1.Gradus1) Family/Spouse: H. Bruin. [Group Sheet] [Family Chart]
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3. | Roelof Hendrik Zwienenberg (1.Gradus1) Family/Spouse: E. van Ginkel. [Group Sheet] [Family Chart] |
4. | Marijke Zwienenberg (2.Johan2, 1.Gradus1) |
5. | Sandra Zwienenberg (2.Johan2, 1.Gradus1) |