Family tree Weening » Jan Koolstra (1911-)

Personal data Jan Koolstra 


Household of Jan Koolstra

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Timeline Jan Koolstra

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Ancestors (and descendant) of Jan Koolstra

Wybe Koolstra
1874-1940

Jan Koolstra
1911-????


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Sources

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Historical events

  • The temperature on February 25, 1911 was between 3.1 °C and 8.9 °C and averaged 6.1 °C. There was 0.4 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
  • Koningin Wilhelmina (Huis van Oranje-Nassau) was from 1890 till 1948 sovereign of the Netherlands (also known as Koninkrijk der Nederlanden)
  • In The Netherlands , there was from February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
  • In the year 1911: Source: Wikipedia
    • The Netherlands had about 6.0 million citizens.
    • January 3 » A gun battle in the East End of London left two dead and sparked a political row over the involvement of then-Home Secretary Winston Churchill.
    • May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
    • August 29 » The Canadian Naval Service becomes the Royal Canadian Navy.
    • September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
    • October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
    • December 29 » Sun Yat-sen becomes the provisional President of the Republic of China; he formally takes office on January 1, 1912.


Same birth/death day

Source: Wikipedia


About the surname Koolstra

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When copying data from this family tree, please include a reference to the origin:
Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I133357.php : accessed October 20, 2026), "Jan Koolstra (1911-)".