| 1. | Willem Johannes Cornelis de Heer was born on 31 Jul 1871 in Rotterdam; died on 23 Mar 1937 in Overschie. Willem married Catharina Elisabeth PUNSELIE on 15 Jun 1899 in Rotterdam. Catharina (daughter of Johannes Jzn PUNSELIE and Johanna Wilhelmina Bax) was born on 20 Jan 1874 in Rotterdam; died on 27 Jan 1959 in Rotterdam. [Group Sheet] [Family Chart]
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| 2. | Willem Johannes Cornelis de Heer Willem married H.E. van Kammen [Group Sheet] [Family Chart]
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| 3. | C.E. de Heer |
| 4. | de Heer |
| 5. | Willem de Heer |
| 6. | de Heer |