Notable Deaths on January 25

109 people 390 – 2025

January 25 has seen 109 notable figures pass away throughout recorded history — from 390 – 2025. Below are the most significant names who died on this date.

By · Wikipedia

Stephen Cole Kleene

1994 — Stephen Cole Kleene

American mathematician, computer scientist, and academic (born 1909)

Did you know

He also invented regular expressions in 1951 to describe McCulloch-Pitts neural networks, and made significant contributions to the foundations of mathematical intuitionism.

Did you know

Stephen Cole Kleene was an American mathematician and logician

Did you know

A number of mathematical concepts are named after him: Kleene hierarchy, Kleene algebra, the Kleene star, Kleene's recursion theorem and the Kleene fixed-point theorem

Did you know

Kleene's work grounds the study of computable functions


Gregory Nazianzus
theologian and Patriarch of Constantinople (born 329)
Gregory of Nazianzus, also known as Saint Gregory the Theologian or Gregory Nazianzen, was an early Roman Christian theologian and prelate who served as Archbishop of Constantinople from 380 to 381. He is widely…
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390
Gaiseric
king of the Vandals (born 389)
Gaiseric, also known as Geiseric or Genseric was king of the Vandals and Alans from 428 to 477 AD. He ruled over the Vandal kingdom and played a key role in the decline of the Western Roman Empire during the 5th century.
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477
Ibrahim ibn al-Walid
Umayyad caliph
Ibrahim ibn al-Walid ibn Abd al-Malik was an Umayyad caliph, and a son of Caliph al-Walid I. He ruled from 4 October 744 to 4 December 744. He was the penultimate Caliph of the Umayyad Caliphate.
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750
Pope Gregory IV (born 795)
Pope Gregory IV was the bishop of Rome and leader of the Papal States from October 827 to his death on 25 January 844. His pontificate was notable for the papacy’s attempts to intervene in the quarrels between Emperor…
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844
Charles of Provence
Frankish king (born 845)
Charles of Provence or Charles of Burgundy was a Carolingian king and ruler of Provence and Lower Burgundy from 855 until his early death in 863.
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863
ruler of Chu (Ten Kingdoms)
Ma Xiguang, courtesy name Depi (德丕), was the fourth ruler of the Chinese Ma Chu dynasty during the Five Dynasties and Ten Kingdoms period.
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951
Margrave of the Nordmark
Lothair I was Margrave of the Nordmark from about 983 until his death. He was also a member of Saxon nobility as Count of Derlingau and of Nordthüringgau.
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1003
Emperor Yingzong of Song (born 1032)
Emperor Yingzong of Song, personal name Zhao Shu, was the fifth emperor of the Song dynasty of China. His original personal name was Zhao Zongshi but it was changed to "Zhao Shu" in 1062 by imperial decree. He reigned…
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1067
Anacletus II, born Pietro Pierleoni, was an antipope who ruled in opposition to Pope Innocent II from 1130 until his death in 1138. After the death of Pope Honorius II, the college of cardinals was divided over his…
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1138
Godfrey I
Count of Louvain and Duke of Lower Lorraine (as Godfrey VI)
Godfrey I, called the Bearded, the Courageous, or the Great, was the Landgrave of Brabant, Count of Brussels and Leuven (Louvain) from 1095 to his death and Duke of Lower Lorraine from 1106 to 1129. He was also Margrave…
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1139
Henry Suso
German priest and mystic (born 1300)
Henry Suso, OP was a German Dominican friar and the most popular vernacular writer of the fourteenth century. An important author in both Latin and Middle High German, he is also notable for defending Meister Eckhart's…
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1366
Countess of Oxford (born 1345)
Maud de Ufford, Countess of Oxford was a wealthy English noblewoman and the wife of Thomas de Vere, 8th Earl of Oxford. Her only child was Robert de Vere, 9th Earl of Oxford, the favourite of King Richard II. In 1404 in…
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1413
Charles II
Duke of Lorraine (born 1364)
Charles II, called the Bold was the Duke of Lorraine from 1390 to his death and Constable of France from 1418 to 1425.
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1431
Ygo Gales Galama
Frisian warlord and rebel (born 1443)
Ygo Gales Galama was a 15th-century Frisian warlord and Galama-patriarch.
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1492
Ferdinand I of Naples (born 1423)
Ferdinand I, also known as Ferrante, was king of Naples from 1458 to 1494.
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1494
Christian II of Denmark (born 1481)
Christian II, a monarch under the Kalmar Union, reigned as King of Denmark and Norway from 1513 until 1523. He was briefly King of Sweden from 1520 until 1521. As king of Denmark and Norway, he was concurrently Duke of…
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1559
Mihrimah Sultan of the Ottoman Empire (born 1522)
Mihrimah Sultan was an Ottoman princess, the daughter of Ottoman Sultan Suleiman the Magnificent and his wife, Hürrem Sultan. According to historian Mustafa Selaniki, she was the most powerful imperial princess in…
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1578
Lucas Cranach the Younger
German painter (born 1515)
Lucas Cranach the Younger was a German Renaissance painter and portraitist, the son of Lucas Cranach the Elder and brother of Hans Cranach.
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1586
Robert Burton
English physician and scholar (born 1577)
Robert Burton was an English author and fellow of Oxford University, known for his encyclopedic The Anatomy of Melancholy.
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1640
Nicholas Francis
Duke of Lorraine (born 1612)
Nicholas Francis, also known as Nicholas II, was briefly Duke of Lorraine and Duke of Bar for a few months in 1634, spanning the time between the abdication of his older brother and his own resignation. He was therefore…
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1670
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Notable deaths

Who died on January 25?

Stephen Cole Kleene — American mathematician (1909–1994)

Death year1994
Known forOne of the students of Alonzo Church, Kleene, along with Rózsa Péter, Alan Turing, Emil Post, and others, is best known as a founder of the branch of mathematical logic known as recursion theory, which subsequently helped to provide the foundations of theoretical computer science
Deaths on this date109 (390 – 2025)

Explore January 25

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

Also on January 25 in History

2019
A mining company's dam collapses in Brumadinho, Brazil, a south-eastern city, killing 270 people. Wikipedia →
2018
An Ariane 5 rocket is launched carrying SES-14, Al Yah 3, and NASA's Global-scale Observations of the Limb and Disk, but the satellites end up in the wrong orbit. Wikipedia →
2015
A clash in Mamasapano, Maguindanao in the Philippines kills 44 members of Special Action Force (SAF), at least 18 from the Moro Islamic Liberation Front and five from the Bangsamoro Islamic Freedom Fighters. Wikipedia →
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