Notable Deaths on September 25

121 people 1066 – 2023

September 25 has seen 121 notable figures pass away throughout recorded history — from 1066 – 2023. Below are the most significant names who died on this date.

By · Wikipedia

John B. Watson

1958 — John B. Watson

American psychologist and academic (born 1878)

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A Review of General Psychology survey, published in 2002, ranked Watson as the 17th most cited psychologist of the 20th century.

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Watson advanced this change in the psychological discipline through his 1913 address at Columbia University, titled Psychology as the Behaviorist Views It

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He was also the editor of Psychological Review from 1910 to 1915

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John Broadus Watson was an American psychologist who popularized the scientific theory of behaviorism, establishing it as a psychological school

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Through his behaviorist approach, Watson conducted research on animal behavior, child rearing, and advertising, as well as conducting the controversial "Little Albert" experiment and the Kerplunk experiment


Harald Hardrada
Norwegian king (born 1015)
Harald Sigurdsson, also known as Harald III and given the epithet Hardrada in the sagas, was King of Norway from 1046 to 1066. He unsuccessfully claimed the Danish throne until 1064 and the English throne in 1066.…
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1066
Norwegian princess
Maria Haraldsdotter was a Norwegian princess, as the daughter of Harald Hardrada and Elisiv of Kiev. She is the first known Norwegian to have been named Maria.
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1066
Tostig Godwinson
English son of Godwin, Earl of Wessex (born c. 1029)
Tostig Godwinson was an Anglo-Saxon Earl of Northumbria and brother of King Harold Godwinson. After being exiled by his brother, Tostig supported the Norwegian king Harald Hardrada's invasion of England, and was killed…
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1066
William VIII
Duke of Aquitaine (born 1025)
William VIII, born Guy-Geoffrey (Gui-Geoffroi), was Duke of Gascony (1052–1086), and then Duke of Aquitaine and Count of Poitiers between 1058 and 1086, succeeding his brother William VII (Pierre-Guillaume).
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1086
Simon I de Montfort
French nobleman (born c. 1025)
Simon I of Montfort or Simon de Montfort was a French nobleman. He was born in Montfort l'Amaury, near Paris, and became its lord. He was the son of Amaury I de Montfort and Bertrade. At his death he was buried about 20…
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1087
Japanese shōgun (born 1301)
Prince Morikuni was the ninth and last shōgun of the Kamakura shogunate of Japan.
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1333
Jakushitsu Genkō
Japanese poet (born 1290)
Jakushitsu Genkō was a Japanese Rinzai master, poet, flute player, and first abbot of Eigen-ji. His poetry is considered to be among the finest of Zen poetry. He traveled to China and studied Ch'an with masters of the…
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1367
Jean de Carrouges
French knight (born 1330)
Sir Jean de Carrouges IV was a French knight who governed estates in Normandy as a vassal of Count Pierre d'Alençon and who served under Admiral Jean de Vienne in several campaigns against the Kingdom of England. He…
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1396
Jean de Vienne
French general and admiral (born 1341)
Jean de Vienne was a French knight, general and Admiral of France during the Hundred Years' War.
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1396
Piero Capponi
Italian soldier and politician (born 1447)
Piero Capponi was an Italian statesman and military leader from Florence; he is celebrated for his bold defiance of the King of France in 1494.
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1496
Philip I of Castile (born 1478)
Philip the Handsome, also called Philip the Fair, was ruler of the Habsburg Netherlands from 1482, including the counties of Artois, Burgundy and Charolais from 1493, and the first king of Castile from the House of…
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1506
Pope Clement VII (born 1478)
Pope Clement VII was head of the Catholic Church and ruler of the Papal States from 19 November 1523 to his death on 25 September 1534. Deemed "the most unfortunate of the popes", Clement VII's reign was marked by a…
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1534
Johannes Secundus
Dutch author and poet (born 1511)
Johannes Secundus was a Neo-Latin poet of Dutch nationality.
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1536
Georg von Blumenthal
German bishop (born 1490)
Georg von Blumenthal was a German Prince-Bishop of Ratzeburg and Bishop of Lebus. He also served as a Privy Councillor of the Margraviate of Brandenburg and Chancellor of the University of Frankfurt (Oder), commonly…
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1550
Tilemann Heshusius
German Gnesio-Lutheran theologian (born 1527)
Tilemann Heshusius was a Gnesio-Lutheran theologian and Protestant reformer.
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1588
Caspar Peucer
German physician, scholar, and reformer (born 1525)
Caspar Peucer was a German reformer, physician, and scholar of Sorbian origin.
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1602
Arbella Stuart
English noblewoman and woman of letters (born 1575)
Lady Arbella Stuart was an English noblewoman who was considered a possible successor to Elizabeth I. During the reign of James VI and I, she married William Seymour, 2nd Duke of Somerset, another claimant to the…
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1615
Emperor Go-Yōzei of Japan (born 1572)
Emperor Go-Yōzei was the 107th Emperor of Japan, according to the traditional order of succession. Go-Yōzei's reign spanned the years 1586 through to his abdication in 1611, corresponding to the transition between the…
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1617
Francisco Suárez
Spanish priest, philosopher, and theologian (born 1548)
Francisco Suárez was a Spanish Jesuit priest, philosopher and theologian, one of the leading figures of the School of Salamanca movement. His work is considered a turning point in the history of second scholasticism,…
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1617
Mary Sidney
English writer (born 1561)
Mary Herbert, Countess of Pembroke was among the first Englishwomen to gain notice for her poetry and her literary patronage. By the age of 39, she was listed with her brother Philip Sidney and with Edmund Spenser and…
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1621
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Notable deaths

Who died on September 25?

John B. Watson — American psychologist (1878–1958)

Death year1958
Known forWatson advanced this change in the psychological discipline through his 1913 address at Columbia University, titled Psychology as the Behaviorist Views It
Deaths on this date121 (1066 – 2023)

Explore September 25

Jump between the main pages for this date to compare events, people, and the daily quiz.

Also on September 25 in History

2018
Bill Cosby is sentenced to three to ten years in prison for aggravated sexual assault. Wikipedia →
2003
The 8.3 Mw  Hokkaidō earthquake strikes just offshore Hokkaidō, Japan. Wikipedia →
1998
PauknAir Flight 4101, a British Aerospace 146, crashes near Melilla Airport in Melilla, Spain, killing 38 people. Wikipedia →
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