Timeline Chart
1904--
1908--
1912--
1916--
1920--
1924--
1928--
1932--
1936--
1939--
| Birth--11 July 1909 - Helpman, Haren, Groningen, Netherlands |
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| Birth--5 November 1912 - Siddeburen, Slochteren, Groningen, Netherlands |
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| Marriage--25 January 1934 - Groningen, Groningen, Groningen, Netherlands (Age 21) |
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| Marriage--25 January 1934 - Groningen, Groningen, Groningen, Netherlands (Age 24) |
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