# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/jean-jacques-dortous-de-mayran
# Generated: 2026-08-15T13:24:06.335Z

schema: https://schema.org/Person
url: "https://fame.am/person/jean-jacques-dortous-de-mayran"
name: "Jean Jacques Dortous de Mayran"
slug: "jean-jacques-dortous-de-mayran"
description: "Jean-Jacques d'Ortous de Mairan was a French natural philosopher (physicist), born in the town of Béziers on 26 November 1678. De Mairan lost his father, François d'Ortous, at age four and his mother twelve years later at age sixteen. Over the course of his life, de Mairan was elected into numerous scientific societies and made key discoveries in a variety of fields, including ancient texts and astronomy. His observations and experiments also inspired the beginning of what is now known as the study of biological circadian rhythms. At the age of 92, de Mairan died of pneumonia in Paris on 20 February 1771."
tagline: "French geophysicist, astronomer and most notably, chronobiologist"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Miger_-_Dortous_de_Mairan-transparent.png?width=1200"
gender: "male"
country:
  name: "France"
  isoCode: "FR"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1678-11-26"
deathDate: "1771-02-20"
livingStatus: "DECEASED"
scores:
  popularity:           47.26
  momentum:             3.922297469321248
  historical:           11.81854
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  70
  trendDirection:       "RISING"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://sv.wikipedia.org/wiki/Jean-Jacques_d'Ortous_de_Mairan"
    title: "Jean-Jacques d'Ortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Jean_Jacques_d%E2%80%99Ortous_de_Mairan"
    title: "Jean Jacques d’Ortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://el.wikipedia.org/wiki/%CE%96%CE%B1%CE%BD-%CE%96%CE%B1%CE%BA_%CE%BD%CF%84%CE%B5_%CE%9C%CE%B1%CE%B9%CF%81%CE%AC%CE%BD"
    title: "Ζαν-Ζακ ντε Μαιράν"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Jean-Jacques_d'Ortous_de_Mairan"
    title: "Jean-Jacques d'Ortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Jean-Jacques_Dortous_de_Mairan"
    title: "Jean-Jacques Dortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://fi.wikipedia.org/wiki/Jean-Jacques_Dortous_de_Mairan"
    title: "Jean-Jacques Dortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Jean-Jacques_Dortous_de_Mairan"
    title: "Jean-Jacques Dortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://it.wikipedia.org/wiki/Jean_Jacques_Dortous_de_Mairan"
    title: "Jean Jacques Dortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://ka.wikipedia.org/wiki/%E1%83%9F%E1%83%90%E1%83%9C-%E1%83%9F%E1%83%90%E1%83%99_%E1%83%93%E1%83%9D%E1%83%A0%E1%83%A2%E1%83%A3_%E1%83%93%E1%83%94_%E1%83%9B%E1%83%94%E1%83%A0%E1%83%90%E1%83%9C%E1%83%98"
    title: "ჟან-ჟაკ დორტუ დე მერანი"
    type:  "WIKIPEDIA"
  - url: "https://nl.wikipedia.org/wiki/Jean-Jacques_Dortous_de_Mairan"
    title: "Jean-Jacques Dortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://no.wikipedia.org/wiki/Jean-Jacques_d%E2%80%99Ortous_de_Mairan"
    title: "Jean-Jacques d’Ortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://pt.wikipedia.org/wiki/Jean-Jacques_d'Ortous_de_Mairan"
    title: "Jean-Jacques d'Ortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://ru.wikipedia.org/wiki/%D0%9C%D0%B5%D1%80%D0%B0%D0%BD%2C_%D0%96%D0%B0%D0%BD-%D0%96%D0%B0%D0%BA_%D0%B4%D0%B5"
    title: "Меран, Жан-Жак де"
    type:  "WIKIPEDIA"
  - url: "https://sl.wikipedia.org/wiki/Jean-Jacques_Dortous_de_Mairan"
    title: "Jean-Jacques Dortous de Mairan"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q55028639"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump