| 1. | Cornelia Heijkoop Family/Spouse: Jacobus Koolen. [Group Sheet] [Family Chart]
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| 2. | Jacobus Koolen Jacobus married Louisa Dieuwertje Punselie on 1 Sep 1954 in Rotterdam. Louisa (daughter of Jacob Punselie and Elisabeth Schol) was born on 6 Aug 1933 in Rotterdam; died on 8 Dec 1997 in Dirksland. [Group Sheet] [Family Chart]
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| 3. | P.C.E. Koolen P.C.E. married E. Busse [Group Sheet] [Family Chart] |
| 4. | J. Koolen J. married Y. van Leeuwen [Group Sheet] [Family Chart] |
| 5. | A. Koolen A. married D.J. Neijs [Group Sheet] [Family Chart] |