Jacobus Johannes van der Werff was a Dutch professor of developmental psychology. He was born on August 8, 1925, in Groningen and passed away on December 3, 2017, in the same city. His work contributed significantly to the field of developmental psychology in the Netherlands.
Zodiac Sign (Western)
Sunsign, Tropical Zodiac
Zodiac Sign (Vedic)
Moonsign, Sidereal Zodiac
Age (Today)
Your next birthday is 362 days away.
Death Anniversary
Next death anniversary is 114 days away.
Death Date
Place of Birth
Time Zone - Europe/Amsterdam (1:19 E)
Chinese Zodiac Sign
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Name Number (Chaldean)
Name Number (Pythagorean)
Meaning of the name - Koos
Nickname for Cornelius or Nicolaas
Read Full Koos Name AnalysisAugust 8, 1925 Facts
Generation Group
Koos van der Werff belongs to the GI Generation group.
Place of Birth: Groningen
Place of Death: Groningen
Educated At: University of Groningen
Occupation: university teacher | psychologist
Employers: University of Groningen | Utrecht University
Astrology Analysis
Note: This birth chart is calculated using the date and place of birth, with the time set to noon (12:00 PM) local time. While this provides accurate planetary positions for most celestial bodies, the Ascendant (Rising Sign) and house cusps are not calculated since they require precise birth time. For a complete astrological analysis including houses and rising sign, please provide the exact birth time.

Ephemeris for August 8, 1925
Note: Moon position is location and time sensitive.Planet | Position (Tropical, Western) | Transits on August 8, 2025 | Secondary Progressions for August 8, 2025 |
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Sun | 15 Leo 21 | 16 Leo 9 | 23 Scorpio 34 |
Moon | 9 Aries 21 | 5 Aquarius 11 | 25 Scorpio 29 |
Mercury | 9 Virgo 2 | 4 Leo 41 | 14 Sagittarius 35 |
Venus | 13 Virgo 37 | 9 Cancer 38 | 10 Capricorn 23 |
Mars | 27 Leo 11 | 0 Libra 55 | 1 Scorpio 55 |
Jupiter | 14 Capricorn 2 | 13 Cancer 17 | 19 Capricorn 14 |
Saturn | 8 Scorpio 47 | 1 Aries 14 | 18 Scorpio 16 |
Uranus | 24 Pisces 54 | 1 Gemini 8 | 21 Pisces 39 |
Neptune | 22 Leo 3 | 1 Aries 51 | 24 Leo 45 |
Pluto | 13 Cancer 54 | 2 Aquarius 14 | 14 Cancer 33 |
Rahu | 4 Leo 0 | 19 Pisces 52 | 28 Cancer 43 |
Ketu | 4 Aquarius 0 | 19 Virgo 52 | 28 Capricorn 43 |
Chandra Kundali (Equal House, North Indian Diamond Chart)
