Koppejan, Willem

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Portrait of Willem Koppejan (click to view image source)
Willem Koppejan
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Koppejan, Willem Gender: M
Willem Ary Koppejan
born on 19 August 1913 at 04:05 (= 04:05 AM )
Place Amsterdam, Netherlands, 52n22, 4e54
Timezone LST m4e53 (is standard time)
Data source
News report
Rodden Rating A
Collector: Rodden
Astrology data s_su.18.gif s_leocol.18.gif 25°33' s_mo.18.gif s_piscol.18.gif 20°40 Asc.s_leocol.18.gif 17°07'


Dutch astrologer, the author of "Willem Koppejan's Astrological Archives - International and Nederland & Vlaanderen," published in 1996. With interests in religion and astrology, he was a writer and teacher, an astrological researcher and lecturer whose venues included the Astrological Association in England.

Willem studied medicine at the University of Leiden and had an active medical practice. Entering the field of astrology, he did horoscopes since 1924 and conducted his astrological practice in The Hague from 1945 till 1960, when he started publishing privately. From 1959, Willem had a joint astro-psychological practice in The Hague with his wife Dr. Helene W. van Woelderen, whom he married in 1970. In 1977, they moved to Glastonbury, England.

He became mainly known for his research into the symbols and degrees of the zodiac, combining the Sabian symbols of Marc Jones and Dane Rudhyar with the degree symbols of the French Janduz (Madame J. Duzea). Willem met Dane Rudhyar in 1960 during his first visit to the U.S. with Helene, which later resulted in the publication by Carolus Verhulst of Servire of nine of Rudhyar's books in English as well as some lectures. Willem wrote "The 360 Degrees of the Zodiac" in Dutch in 1956, which was later rewritten by his wife Helene in English with Niek Scheps as "The Zodiac Image Handbook" in three volumes, including his vision on Grail Astrology and published in 1990. The Dutch translation by Willem van Panhuys "Beeldgids van de dierenriem" in three volumes was published in 1991. Most of Willem's library on astrology and esoteric subjects is on loan to the Library of Avalon in the Glastonbury Experience, a complex of buildings with spiritual activities, started and financed by Willem and Helene in 1978.

He died on 5/20/1979 in England.

Link to Astrowiki (German)



  • Work : New Job 1924 (Pro astrologer)
  • Work : Begin Major Project 1945 (Started his practice, 15 years)
  • Relationship : Marriage 1970 (Dr. Helene W. van Woelderen)
  • Family : Change residence 1977 (Moved to Glastonbury, England)
  • Death, Cause unspecified 20 May 1979 at 06:45 AM (Age 66)
    chart Placidus Equal_H.
  • Work : Published/ Exhibited/ Released 1990 (Book published)
  • Work : Published/ Exhibited/ Released 1996 (Book published)

Source Notes

Tees Reitsma, a colleague, submits his data to Donna Cunningham's Astrologer's Memorial (Rectified by Koppejan to 3:55 from a given 4:00 AM Amsterdam time)

Cirkels quotes an astrology magazine for 4:05 AM


  • Family : Relationship : Mate - Noted (Helene, worked and wrote together)
  • Vocation : Healing Fields : Psychologist
  • Vocation : Occult Fields : Astrologer (Pro, data collector)
  • Vocation : Writers : Astrology (Books)