Graunt, John

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Graunt, John Gender: M
born on 24 April 1620 Jul.Cal. (4 May 1620 greg.) at 07:30 (= 07:30 AM )
Place London, England, 51n30, 0w10
Timezone LMT m0w10 (is local mean time)
Data source
Rodden Rating B
Collector: Scholfield
Astrology data s_su.18.gif s_taucol.18.gif 14°05' s_mo.18.gif s_gemcol.18.gif 08°23 Asc.s_cancol.18.gif 07°10'


English statistician, one of the first demographers, and by profession a haberdasher.

Graunt, along with his friend William Petty, developed early human statistical and census methods that later provided a framework for modern demography. He is credited with producing the first life table, giving probabilities of survival to each age. Graunt is also considered as one of the first experts in epidemiology, since his famous book was concerned mostly with public health statistics.

His book Natural and Political Observations Made upon the Bills of Mortality (1662 Old Style or 1663 New Style) used analysis of the bills of mortality (weekly statistics of deaths) in early modern London as Charles II and other officials attempted to create a system to warn of the onset and spread of bubonic plague in the city. Though the system was never truly created, Graunt's work in studying the rolls resulted in the first statistically based estimation of the population of London. His work ran to five editions by 1676.

The erudition of the Observations led Graunt to the Royal Society, where he presented his work and was subsequently elected a fellow in 1662 with the endorsement of the King. He was chosen as a member of the council in November 1664 and represented the society at various meetings.

His house was destroyed in the Great Fire of London and he encountered other financial problems leading eventually to bankruptcy. His daughter became a nun in a Belgian convent and Graunt decided to convert to Catholicism at a time when Catholics and Protestants were struggling for control of England and Europe, leading to prosecutions for recusancy. He died of jaundice and liver disease on 18 April 1674, aged 53.

Link to Wikipedia biography


  • friend relationship with Petty, William (born 26 May 1623 Jul.Cal. (5 June 1623 greg.))


  • Death by Disease 18 April 1674 Jul.Cal. (28 Apr 1674 greg.) (Jaundice and liver disease, age 53)
    chart Placidus Equal_H.

Source Notes

Sy Scholfield quotes from Athenae Oxonienses. An Exact History of All the Writers and Bishops, who Have Had Their Education in the ... University of Oxford from the Year 1500 to the End of the Year 1690 by Anthonya Wood (Bennet, 1691), p. 269: "His name is Joh.Graunt, born at the sign of the Seven Stars in Birchin-lane, within the Parish of St. Michael-Cornhil in London, between 7 and 8 of the clock in the morn. of the 24. of Apr. 1620. (Son of Hen. Graunt a Hampshire man)."


  • Diagnoses : Body Part Problems : Liver/Pancreas/Spleen (Liver disease)
  • Lifestyle : Financial : Loss - Bankruptcy
  • Vocation : Business/Marketing : Sales (Haberdasher)
  • Vocation : Politics : Public office
  • Vocation : Science : Mathematics/ Statistics (Demographer)
  • Vocation : Writers : Textbook/ Non-fiction
  • Notable : Famous : First in Field (Produced the first life table)