Family tree Van Koert » Willem Tefsen (1900-1978)

Personal data Willem Tefsen 


Household of Willem Tefsen

He is married to Geertruda Lonnee.

They got married on November 5, 1930 at Amsterdam, he was 30 years old.

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Historical events

Birthday September 16, 1900

  • The temperature on September 16, 1900 was about 15.0 °C. The airpressure was 76 cm mercury. The atmospheric humidity was 90%. 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 July 27, 1897 to August 1, 1901 the cabinet Pierson, with Mr. N.G. Pierson (unie-liberaal) as prime minister.
  • In the year 1900: Source: Wikipedia
    • The Netherlands had about 5.1 million citizens.
    • January 6 » Second Boer War: Having already besieged the fortress at Ladysmith, Boer forces attack it, but are driven back by British defenders.
    • February 6 » The Permanent Court of Arbitration, an international arbitration court at The Hague, is created when the Senate of the Netherlands ratifies an 1899 peace conference decree.
    • March 18 » AFC Ajax Amsterdam, The Netherlands's biggest and most successful football club, was founded.
    • June 18 » Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
    • June 20 » Boxer Rebellion: The Imperial Chinese Army begins a 55-day siege of the Legation Quarter in Beijing, China.
    • December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.

Day of death April 19, 1978

  • The temperature on April 19, 1978 was between 2.1 °C and 14.9 °C and averaged 8.9 °C. There was 1.6 mm of rain during 0.4 hours. There was 6.8 hours of sunshine (48%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. Source: KNMI
  • Koningin Juliana (Huis van Oranje-Nassau) was from September 4, 1948 till April 30, 1980 sovereign of the Netherlands (also known as Koninkrijk der Nederlanden)
  • In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
  • In the year 1978: Source: Wikipedia
    • The Netherlands had about 13.9 million citizens.
    • March 16 » Former Italian Prime Minister Aldo Moro is kidnapped. (He is later murdered by his captors.)
    • April 7 » Development of the neutron bomb is canceled by President Jimmy Carter.
    • April 28 » President of Afghanistan, Mohammed Daoud Khan, is overthrown and assassinated in a coup led by pro-communist rebels.
    • July 25 » Birth of Louise Joy Brown, the first human to have been born after conception by in vitro fertilisation, or IVF.
    • November 17 » The Star Wars Holiday Special airs on CBS, receiving negative reception from critics, fans, and even Star Wars creator George Lucas.
    • November 27 » In San Francisco, city mayor George Moscone and openly gay city supervisor Harvey Milk are assassinated by former supervisor Dan White.


Same birth/death day

Source: Wikipedia

Source: Wikipedia


About the surname Tefsen

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The Family tree Van Koert publication was prepared by .contact the author
When copying data from this family tree, please include a reference to the origin:
Rob van Koert, "Family tree Van Koert", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-koert/I28512.php : accessed February 1, 2026), "Willem Tefsen (1900-1978)".