Isaac Newton
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Isaac Newton (1642 - 1727)

Sir Isaac Newton
Born in Woolsthorpe by Colsterworth, Lincolnshire, Englandmap
Ancestors ancestors
Brother of [half], [half] and [half]
Died at age 84 in Kensington, Middlesex, Englandmap
Profile last modified | Created 6 Jan 2010
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Please do not alter the birth and death dates - see Research Notes



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Isaac Newton is Notable.
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Isaac Newton was born in Lincolnshire, England.

Isaac Newton was born 25 December 1642 at Woolsthorpe by Colsterworth in the Colsterworth, Lincolnshire England. He was the only child of:

Isaac's parents were probably married in April 1642 (or before). His father died in the October (buried 6 October 1642) just three months before Newton was born on 25 December 1642 at Woolsthorpe manor. [2] This property had been purchased by Newton's paternal great-great-grandfather, John Newton of Westby, Lincolnshire (bur. 22 Dec 1563 Westby). [1][5]. The young Isaac was baptised s/o Isaac & Hannah Newton on the 1st of January 1642/3 at Colsterthorpe (so recorded although his father was deceased) [6]

In 1646, Isaac Newton's mother remarried to Barnabas Smith, Rector of Witham, Lincolnshire [2][7] while Newton was left in the care of his maternal grandmother Margaret (Blyth) Ayscough (abt.1590-aft.1657) at Woolsthorpe. [2][8][9]

From his mother's second marriage, Isaac had three half-siblings, who were all named in the will of his maternal grandfather, James Ayscough: [2][3]

  1. Benjamin Smith. [3]
  2. Mary Smith. [3]
  3. Hannah Smith [3]

Isaac was swiftly passed to the care of his maternal grandmother Margaret (Blyth) Ayscough (abt.1590-aft.1657) and it is said that he did not get to know his own mother until he was much older.


Newton began his education at local schools, then attended Grantham grammar school (about 8 miles North of his home). His youthful inventions include a small windmill [10], a clock run by water [11]and a sundial.[12]

Late in 1659, near the age of seventeen, his mother called him home from school to take charge of her considerable estate. The experiment was a disaster. He wanted none of it. He had discovered the world of learning, and there his heart lay.

Isaac was sent to Cambridge by his maternal uncle, William Ayscough, Rector of Burton Coggles, Lincolnshire. He was admitted to Trinity College in June 1661. He graduated in 1665 but was not an exceptional student.

He was probably at Woolsthope during the plague in 1665-66. It was around this time when he discovered "gravitational attraction."

During the 1660s he began a series of experiments with sunlight and prisms. He demonstrated that clear white light was composed of seven visible colors.

In 1667, he returned to Cambridge to teach, and became Lucasian Professor of Mathematics in the University of Cambridge in 1669. He later invented calculus to explain motion.

His theories made no significant impact until 1684 when the English astronomer Edmond Halley, asked him for assistance to explain the motion of planets around the sun. Halley, however, found that Newton already had a solution, so the astronomer put aside his work to publish Newton's discoveries.

In 1687 Newton's discoveries on the laws of motion and theories of gravitation were published in "Philosophiae Naturalis Principia Mathematica" (Mathematical Principles of Natural Philosophy), or "Principia."[13] This book has been considered one of the greatest single contributions in the history of science and laid the foundations of classical mechanics.

Newton's discoveries in optics were equally great. His work on light was collected in his highly influential book "Opticks".[14] First published in 1704, it laid out the foundation of spectrum analysis and explained why objects are perceived to have color. In 1668 he had constructed the first reflecting telescope, and then in 1671 he built an improved second model of the reflecting telescope.[15][16] Later that same year Newton had been requested to send his telescope to the Royal Society to be examined. Newton's second model arrived in December 1671, and in January of 1672 the Royal Society announced that King Charles II as well as prominent members of the Royal Society had inspected the telescope and were much impressed with it.[15][16] That January Newton was elected as a fellow of the Royal Society.[16]

Religion & Politics

Newton also dedicated much of his time to the study of alchemy and biblical chronology, but most of his work in those areas remained unpublished until long after his death.

He was a fellow of Trinity College. A devout but unorthodox Christian, he privately rejected the doctrine of the Trinity and refused holy orders in the Church of England.

Politically and personally tied to the Whig party, Newton served two brief terms as Member of Parliament for the University of Cambridge, in 1689–90 and 1701–02. His motivation appears to be related to a campaign to install a Roman Catholic majority at the university, following the death of Charles II and the succession of James I to the throne.[17]

In 1701 he left Trinity College to settle in London, where spent his last three decades. He served as Warden (1696–1700) and Master (1700–1727) of the Royal Mint, as well as president of the Royal Society (1703–1727).


In 1705, Newton was knighted by Queen Anne and became the first scientist in Europe so honoured. But before he could be titled, he had to submit an affadavit for knighthood.[2]

This requirement led to Newton being the one to draw up the chart for the Newton pedigree in 1705.[1][18] Later on, Newton is said to have doubts about this chart, and apparently ... there are two family traditions. The variations are:[18]

  1. descent from John of Westby (as submitted by Newton himself).[1]
  2. or descent from a gentleman of East Lothian in Scotland.[18]

While Newton seemed to favor the latter variation during c. 1725-27, antiquarians believed that it was not "as strong" as the 1705 pedigree.[18]


Newton died on 20 March 1726/7 at the age of 84. He was buried at Westminster Abbey. [19] His memorial statue in the chapel of Trinity College, Cambridge, England, of which he was a distinguished member, is inscribed "Qui genus humanum ingenio superavit" (He surpassed the race of man in understanding). [19]

He was said to have left a fortune of £27,000, including bequests to several Cambridge institutions. Isaac Newton never married or had children. Woolsthorpe was inherited by a cousin, but no later member of the family entered Parliament. [20]

Research Notes

In the past, contributors have erroneously tried to adjust Newton's birth and death dates to accommodate the change from Julian to Gregorian calendars in 1752 with the loss of 11 days in that year. [21] The Calendar Act of 1750 stipulated that no adjustments were to be made retrospectively to the dates of past events. This article by Thony has previously been used to justify adding a birth date of 4 January 1643 and a death date of 31 March 1727, but is incorrect in this proposition. [22]


  1. 1.0 1.1 1.2 1.3 Howard, J.J. (1874). "Pedigree of Newton," in Miscellanea Genealogica et Heraldica,1(1), p. 173. London: Hamilton, Adams & co. eBook. (copy based on pedigree submitted by Sir Isaac Newton; mirror @ Google Books).
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Baird, K. (1987). Some Influences upon the Young Isaac Newton. Notes and Records of the Royal Society of London, 41(2), 169-179. Retrieved from
  3. 3.0 3.1 3.2 3.3 3.4 will of James Ayscough
  4. Isaac Newton; citing item 2; FHL microfilm 1,450,482.[1]
  5. Isaac Newton, burial 06 Oct 1642; citing Colsterworth, Lincoln; FHL microfilm 1,450,482.[2]
  7. Barnabas Smith and ... Newton, 27 Jan 1645; citing North Witham, Lincoln, England; FHL microfilm 1,450,486.[3]
  8. see also: Wikipedia: Woolsthorpe-by-Colsterworth
  9. James Aiscoigh and Margery Blyth, 24 Dec 1609; citing Stroxton, Lincoln; FHL microfilm 505,746.[4]
  13. Wikipedia: Philosophiæ Naturalis Principia Mathematica
  14. Wikipedia: Opticks
  15. 15.0 15.1 Mills, A. A. and Turvey, P. J.. “Newton’s Telescope, an examination of the reflecting telescope attributed to Sir Isaac Newton in the Possession of the Royal Society”. Notes and Records: The Royal Society Journal of the History of Science 33, no. 2 (print: 1979, online 1997): 133-155. (accessed 18 July 2022).
  16. 16.0 16.1 16.2 “Newton’s Life and Work at a Glance”. The Newton Project. (accessed 18 July 2022).
  17. Henning, B.D. (1983). Newton, Isaac (1642-1727), of Woolsthorpe, Colsterworth, Lincs. and Trinity College, Cambridge. HOP. Web.
  18. 18.0 18.1 18.2 18.3 "The genealogical descent of Sir Isaac Newton," (1852). The Gentleman's Magazine, 192, p. 271. Google Books.
  19. 19.0 19.1 Find A Grave: Memorial #21644, citing Westminster Abbey.
  20. More, 666-7; Hearne’s Colls. (Oxf. Hist. Soc. lxv), 293, 294.
  21. Full text of the Calendar (New Style) Act 1750. Google books Accessed 2 June 2020. The Act is dated as 1750 but this is because it was proposed in February 1750 - which is actually February 1751 New Style New Year
  22. Thony, Christie (2015) Calendrical confusion or just when did Newton die?, The Renaissance Mathematicus, retrieved 05 May 2017 from;

See also:

  • Bullingham House, off Church-Street, Kensington. This was the house where Sir Isaac Newton died. The house and extensive garden have been built over.

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Comments: 8

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Newton-16383 and Newton-17 appear to represent the same person because: Newton-16383 is a recently created unsourced duplicate with birthdate of Sir Isaac Newton-17
posted by Jo Fitz-Henry
13th cousin 7 times removed. 🧐🙃🙂

Thank you Math Day Relative finder

posted by Jane (Cournoyer) McNicol
edited by Jane (Cournoyer) McNicol
Wanted to say Thank You! to the project managers… It’s a labor of luvv to maintain ur family and keep up with this kind of profile, I’m sure.
posted by K Morse
Hello Profile Managers!

We are featuring this profile in the Connection Finder this week. Between now and Wednesday is a good time to take a look at the sources and biography to see if there are updates and improvements that need made, especially those that will bring it up to WikiTree Style Guide standards. We know it's short notice, so don't fret too much. Just do what you can.



posted by Abby (Brown) Glann
It is incorrect and probably anachronistic to describe Newton as "a member of the aristocracy in England". His father was confessedly a "yeoman". What's wrong with that?

As a graduate of Trinity College, I do not think it's correct to say that he "matriculated into" Trinity Coll. Neither was he "a math professor".

Thanks for pointing these slips out. I have amended the profile.
posted by Michael Cayley
There is no justification for the suffix "Jr" as he was born posthumously.
posted by Matthew Fletcher
Shouldn't Sir Isaac Newton be a part of the Notables Project?