Dr.
Johann
Friedrich
"Johannes Fredericus, Joannes Fridericus"
Schweitzer
aka Helvetius
Born in Cöthen, Anhalt, Germany
Son of Balthasar Schweitzer
and Anna Joostdr. Braun
[sibling(s) unknown]
Husband of
Johanna Pels
— married
30 Jun 1658 in Den Haag, Zuid-Holland, Republiek der Zeven Verenigde Nederlanden
Descendants 
Father of
Josephus Johannes Helvetius
Died
at age 79
in Den Haag, Zuid-Holland, Republiek der Zeven Verenigde Nederlanden
Profile last modified
| Created 8 Apr 2023
This page has been accessed 79 times.
Contents |
Biography
Johann Schweitzer is Notable.
Dr. Johann ( Johannes) Friedrich (Fredericus) Schweitzer usually known as Helvetius, was born or baptised on 17 January 1630 in Cöthen, Anhalt, the son of Dr. Balthasar Schweitzer and Anna Joostdr. Braun (or Braunin or Brouwman). [1]
Marriage and children
On 30 June 1658 in 's-Gravenhage, he married Johanna Pels, daughter of Jan Barendszoon Pels and Mayken Six. They became the parents of sixteen children of whom only four sons and four daughters grew up to adulthood.
Profession
Doctor and Practitioner of Medicine. [2]
Johannes Fredericus is notorious for the story that he actually carried out transmution of lead into gold. It was said that he had been the physician of the Prince of Orange and to have known Baruch Spinoza. He wrote many books of which one is Vitulus Aureus (The Golden Calf), published in 1667. [3]
Death and burial
His wife died in March 1709 and was buried on 25 March 1709 in 's-Gravenhage. Dr. Johannes Fredericus Schweitzer died on 29 August 1709 in 's-Gravenhage and was buried there on 3 September 1709. [4]
Sources
- ↑ Wikipedia Johann Friedrich Schweitzer. [1]
- ↑ Project Gutenberg. The Golden Calf, Which the World Adores, and Desires by Johann Friedrich Helvetius. [2]
- ↑ Nieuw Nederlandsch biografisch woordenboek. Deel 3 (1914)–P.J. Blok, P.C. Molhuysen. [3]
- ↑ Detailed information Dr. Josephus Johannes on website maintained by Leo van de Pas on genealogics.org. [4] with source by Gens Nostra, Source ID: S00021 1970 193.
See also:
- Wikidata: Item Q2589707
- Helvetius (Joannes Fridericus) in Biographisch woordenboek der Nederlanden, vol 8, (1867), pp. 509-512. [5]
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Categories: Alchemists | Physicians | Dutch Notables | Notables