Georg Ferdinand Ludwig Philipp Cantor ( ; ; – January 6, 1918 ) was a German mathematician, best known as the inventor of set theory, which has become a fundamental theory in mathematics.

On 7 January 1734, he married Katharina Gsell ( 1707 – 1773 ), a daughter of Georg Gsell, a painter from the Academy Gymnasium.

The first white dwarf discovered was in the triple star system of 40 Eridani, which contains the relatively bright main sequence star 40 Eridani A, orbited at a distance by the closer binary system of the white dwarf 40 Eridani B and the main sequence red dwarf 40 Eridani C. The pair 40 Eridani B / C was discovered by William Herschel on 31 January 1783 ;< sup >, p. 73 </ sup > it was again observed by Friedrich Georg Wilhelm Struve in 1825 and by Otto Wilhelm von Struve in 1851.

* January 6 – Georg Cantor, German mathematician ( b. 1845 )

* January 16 – Georg Heym, writer ( b. 1887 ).

* January 26 – Duke Georg Alexander of Mecklenburg, head of the House of Mecklenburg-Strelitz ( b. 1921 )

* January 4 – Georg von Hertling, Chancellor of Germany ( b. 1843 )

* January 6 – Hieronymus Georg Zeuthen, Danish mathematician ( b. 1839 )

* January 22 – Georg Lurich, Estonian Greco-Roman wrestler and strongman ( b. 1876 )

* January 15 – Georg Dertinger, foreign minister of East Germany, is arrested for spying.

* January 11 – Johann Georg Graevius, German classical scholar and critic ( b. 1632 )

* January 29 – Johann Georg Graevius, German classical scholar and critic ( d. 1703 )

* January 24 – Georg Jenatsch, Swiss politician ( b. 1596 )

* January 13 – Johann Georg Walch, German theologian ( b. 1693 )

* January 21 – Johann Georg Gichtel, German mystic ( b. 1638 )

* January 26 – Georg Mohr, Danish mathematician ( b. 1640 )

* January 29 – Georg Christoph Wagenseil, Austrian composer ( d. 1777 )

Together, Wilhelm and Henriette had four children: Jacob Grimm ( 3 April 1826 – 15 December 1826 ), Herman Friedrich Grimm ( 6 January 1828 – 16 June 1901 ), Rudolf Georg Grimm ( 31 March 1830 – 13 November 1889 ), and Barbara Auguste Luise Pauline Marie ( 21 August 1832 – 9 February 1919 ).

Johann Georg Adam Forster ( November 27, 1754 – January 10, 1794 ) was a German-Polish naturalist, ethnologist, travel writer, journalist, and revolutionary.

Yet before the reign of terror reached its climax, Georg Forster died of a stroke after a rheumatic illness in his small attic apartment at Rue des Moulins in Paris in January 1794, at the age of thirty-nine.

In January 1781, before Georg Ohm's work, Henry Cavendish experimented with Leyden jars and glass tubes of varying diameter and length filled with salt solution.

* Willem Georg Frederik, Prince of Orange-Nassau ( The Hague, 15 February 1774 – Padua, 6 January 1799 ), unmarried and without legitimate issue.

Jørgen Mohr ( Latinised Georg ( ius ) Mohr ) ( April 1, 1640 – January 26, 1697 ) was a Danish mathematician.

In December 1831, he transferred Hauser to Ansbach, to the care of a schoolmaster named Johann Georg Meyer, and in January 1832 Stanhope left Hauser for good.

Johann Georg Walch ( June 17, 1693 – January 13, 1775 ) was a German Lutheran theologian.

Barthold Georg Niebuhr ( August 27, 1776, Copenhagen – January 2, 1831, Bonn ) was a Danish-German statesman and historian who became Germany's leading historian of Ancient Rome and a founding father of modern scholarly historiography.

* Edgar Allan Poe, Review of Lieber's Reminiscences of Niebuhr, from Southern Literary Messenger, January 1836.

Niebuhr himself was quoted in the January 1950 Grapevine as saying the prayer " may have been spooking around for years, even centuries, but I don't think so.

Grapevine, The International Journal of Alcoholics Anonymous, identified Niebuhr as the author ( January 1950, pp. 6 – 7 ), and the AA web site continues to identify Niebuhr as the author.

Edward Gibbon ( 27 April 173716 January 1794 ) was an English historian and Member of Parliament.

Pierre de Frédy, Baron de Coubertin (; 1 January 1863 – 2 September 1937 ) was a French educator and historian, and founder of the International Olympic Committee.

His birth date has traditionally been recorded as January 19, 1807, but according to the historian Elizabeth Brown Pryor, " Lee's writings indicate he may have been born the previous year.

Yule is attested early in the history of the Germanic peoples ; from the 4th century Gothic language it appears in the month name, and, in the 8th century, the English historian Bede wrote that the Anglo-Saxon calendar included the months geola or giuli corresponding with either modern December or December and January.

Zachris Topelius (; 14 January 1818 – 12 March 1898 ) was a Swedish-speaking Finnish author, journalist, historian, and rector of the University of Helsinki who wrote novels related to Finnish history in Swedish.

* January 13 – Henri Langlois, French film historian ( b. 1914 )

* January 30 – Charles Rollin, French historian ( d. 1741 )

* January 30 – Allan W. Eckert, American historian, naturalist, and author

* January 11 – James Milton Carroll, Baptist pastor, historian, and author ( b. 1852 )

* January 21 – Henry Hallam, English historian ( b. 1777 )

* January 28 – Robert von Dassanowsky, American cultural historian, writer, and producer

* January 2 – John Hope Franklin, American historian ( d. 2009 )

* January 25 – Edgar V. Saks, Estonian statesman and historian ( d. 1984 )

* January 31 – Viktor Maksimovich Zhirmunsky, Russian literary historian, linguist ( b. 1891 )

* January 8 – Abbé Charles-Étienne Brasseur de Bourbourg, French writer and historian ( b. 1814 )

* January 2 – Ben-Zion Dinur, Russian-born Israeli educator, historian and politician ( d. 1973 )

* January 25 – Benjamín Vicuña Mackenna, Chilean historian ( b. 1831 )

* January 6 – Yevgeny Tarle, Soviet historian ( b. 1874 )

* January 11 – Ernst Nolte, German historian

* January 12 – Tadeusz Żychiewicz, Polish journalist, art historian and publicist ( d. 1994 )

* January 6 – Carl Sandburg, American poet and historian ( d. 1967 )

* January 16 – Edward Gibbon, English historian ( b. 1737 )

* January 8 – James Milton Carroll, Baptist pastor, leader, historian, and author ( d. 1931 )

* January – Józef Białynia Chołodecki, Polish historian ( b. 1852 )

* January 4 – Frederick York Powell, English historian and scholar ( d. 1904 )