Jan Ketelaar

Dutch chemist (1908-2001)
Person human Q2760858
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Jan Ketelaar

Summary

Jan Ketelaar is a human[1]. He was born in Amsterdam[2]. He was born on April 21, 1908[3]. He died in Lochem[4]. He died on November 23, 2001[5]. He worked as a chemist[6] and university teacher[7].

Key Facts

  • Jan Ketelaar's place of birth was Amsterdam[2].
  • Jan Ketelaar died in Lochem[4].
  • Jan Ketelaar was born on April 21, 1908[3].
  • Jan Ketelaar died on November 23, 2001[5].
  • Jan Ketelaar held citizenship in Kingdom of the Netherlands[8].
  • Dutch was Jan Ketelaar's native language[9].
  • Jan Ketelaar's professions included chemist[6].
  • Jan Ketelaar worked as a university teacher[7].
  • Among Jan Ketelaar's employers was Leiden University[10].
  • Among Jan Ketelaar's employers was University of Amsterdam[11].
  • Among Jan Ketelaar's employers was University of Amsterdam[12].
  • Among Jan Ketelaar's employers was University of Amsterdam[13].
  • Jan Ketelaar's education included a stint at University of Amsterdam[14].
  • Jan Ketelaar's doctoral advisor was Andreas Smits[15].
  • Jan Ketelaar was a member of Royal Netherlands Academy of Arts and Sciences[16].
  • Jan Ketelaar is recorded as male[17].
  • Jan Ketelaar's instance of is recorded as human[18].
  • Jan Ketelaar supervised Jan Kommandeur as a doctoral student[19].
  • Jan Ketelaar supervised Johan van Dranen as a doctoral student[20].
  • Jan Ketelaar supervised Cornelis Romers as a doctoral student[21].
  • Jan Ketelaar supervised Johannes Pieter Colpa as a doctoral student[22].
  • Jan Ketelaar supervised Cornelis Haas as a doctoral student[23].
  • Jan Ketelaar supervised Jan van der Elsken as a doctoral student[24].
  • Jan Ketelaar supervised Rudolf Peter Hendrik Rettschnick as a doctoral student[25].
  • Jan Ketelaar supervised Judicus M. P. J. Verstegen as a doctoral student[26].

Body

Origins and Family

Born in Amsterdam[2], Jan Ketelaar… he was born on April 21, 1908[3]. Dutch was his native language[9].

Education

Jan Ketelaar was educated at University of Amsterdam[14]. His doctoral advisor was Andreas Smits[15].

Career and Affiliations

Recorded occupations include chemist[6] and university teacher[7]. Employers include Leiden University[10], a university[27], in Netherlands[28], founded in 1575[29], headquartered in Leiden[30] and University of Amsterdam[11], a university[31], in Netherlands[32], founded in 1632[33], headquartered in Amsterdam[34]. Doctoral students include Jan Kommandeur[19], a university teacher[35], 1929–2012[36], of Kingdom of the Netherlands[37]; Johan van Dranen[20]; Cornelis Romers[21], a university teacher[38], b. 1919[39], of Kingdom of the Netherlands[40]; Johannes Pieter Colpa[22]; Cornelis Haas[23]; and Jan van der Elsken[24], 1929–2025[41].

Death and Burial

Jan Ketelaar died on November 23, 2001[5]. He died in Lochem[4].

FAQs

Where was Jan Ketelaar born?

Jan Ketelaar was born in Amsterdam[2].

Where did Jan Ketelaar die?

Jan Ketelaar died in Lochem[4].

What did Jan Ketelaar do for work?

Jan Ketelaar worked as chemist[6] and university teacher[7].

Where did Jan Ketelaar go to school?

Jan Ketelaar was educated at University of Amsterdam[14].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] . Retrieved . wikidata.org.
  2. [4] . Album Academicum. Retrieved . wikidata.org.
  3. [17] . Leidse Hoogleraren. Retrieved . wikidata.org.
  4. [8] . Leidse Hoogleraren. Retrieved . wikidata.org.
  5. [18] . wikidata.org.
  6. [14] . Mathematics Genealogy Project. wikidata.org.
  7. [9] . wikidata.org.
  8. [6] . wikidata.org.
  9. [7] . Leidse Hoogleraren. Retrieved . wikidata.org.
  10. [10] . Leidse Hoogleraren. Retrieved . wikidata.org.
  11. [11] . Album Academicum. Retrieved . wikidata.org.
  12. [12] . Album Academicum. Retrieved . wikidata.org.
  13. [13] . Album Academicum. Retrieved . wikidata.org.
  14. [15] . Mathematics Genealogy Project. wikidata.org.
  15. [19] . Mathematics Genealogy Project. wikidata.org.
  16. [20] . Mathematics Genealogy Project. wikidata.org.
  17. [21] . Mathematics Genealogy Project. wikidata.org.
  18. [22] . Mathematics Genealogy Project. wikidata.org.
  19. [23] . Mathematics Genealogy Project. wikidata.org.
  20. [24] . Mathematics Genealogy Project. wikidata.org.
  21. [25] . Mathematics Genealogy Project. wikidata.org.
  22. [26] . Mathematics Genealogy Project. wikidata.org.
  23. [16] . wikidata.org.
  24. [3] . Biografisch Portaal. Retrieved . wikidata.org.
  25. [5] . Biografisch Portaal. Retrieved . wikidata.org.

Inline context (facts about related entities)

  1. [27] . Wikidata. wikidata.org. → on this site
  2. [28] . Wikidata. wikidata.org. → on this site
  3. [29] . Wikidata. wikidata.org. → on this site
  4. [30] . Wikidata. wikidata.org. → on this site
  5. [31] . Wikidata. wikidata.org. → on this site
  6. [32] . Wikidata. wikidata.org. → on this site
  7. [33] . Wikidata. wikidata.org. → on this site
  8. [34] . Wikidata. wikidata.org. → on this site
  9. [35] . Wikidata. wikidata.org. → on this site
  10. [36] . Wikidata. wikidata.org. → on this site
  11. [37] . Wikidata. wikidata.org. → on this site
  12. [38] . Wikidata. wikidata.org. → on this site
  13. [39] . Wikidata. wikidata.org. → on this site
  14. [40] . Wikidata. wikidata.org. → on this site
  15. [41] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

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APA 4ort.xyz Knowledge Graph. (2026). Jan Ketelaar. Retrieved May 3, 2026, from https://4ort.xyz/entity/jan-ketelaar
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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 25d ago · Epìdosis · 2026-06-27 view diff on Wikidata ↗
    National virtual library of india id 167432
    Biografisch portaal van nederland id 23725756
    Date of birth +1908-04-21T00:00:00Z
    Place of birth Amsterdam
    + 41 other properties edited (see Wikidata diff for full list)
    "/* wbcreateclaim-create:1| */ [[Property:P12458]]: 356541, [[:toollabs:quickstatements/#/batch/259855|batch #259855]]"
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