Born in 1801

Jan 8 John Joseph Bennett a British botanist.
Jan 11 Honório Hermeto Carneiro Leão Marquis of Paraná a politician, diplomat, judge and monarchist of the Empire of Brazil. Paraná was born to a family of humble means in São Carlos do Jacuí, in what was then the captaincy of Minas Gerais. After attending the University of Coimbra in Portugal and having returned to Brazil, Paraná was appointed a judge in 1826 and later elevated to appellate court justice. In 1830, he was elected to represent Minas Gerais in the Chamber of Deputies; he was re-elected in 1834 and 1838, and held the post until 1841
Jan 14 Adolphe-Théodore Brongniart a French botanist. He was the son of the geologist Alexandre Brongniart and grandson of the architect, Alexandre-Théodore Brongniart. Brongniart's pioneering work on the relationships between extinct and existing plants has earned him the title of father of paleobotany. His major work on plant fossils was his Histoire des végétaux fossiles. He wrote his dissertation on the Buckthorn family , an extant family of flowering plants, and worked at the Muséum national d'Histoire naturelle in Paris until his death. In 1851, he was elected a foreign member of the Royal Swedish Academy of Sciences. This botanist is denoted by the author abbreviation Brongn. when citing a botanical name
Jan 15 Josef Eduard Teltscher an Austrian painter and lithographer. He was one of the best Viennese portrait lithographers and watercolourists of the first half of the nineteenth century in Central Europe, and as a miniaturist, according to his contemporaries, he was an no less than Moritz Daffinger himself
Jan 16 Thomas Clausen (mathematician) a Danish mathematician and astronomer.
Jan 20 Alexandre Dechet regarded the author of the lyrics of the Brabançonne, the Belgian national anthem. His pseudonym was Jenneval, possibly named after the drama Jenneval, ou le Barnevelt français of Louis Sébastien Mercier
Jan 21 John Batman an Australian grazier, entrepreneur and explorer. He settled in the north-east of the Van Diemen's Land Colony in the 1820s, and later as a leading member of the Port Phillip Association he led an expedition which explored the Port Phillip Bay area on the Australian mainland with a view to establishing a new settlement there. He is best known for his role in the founding of the settlement on the Yarra River which became the city of Melbourne, eventual capital of the new Colony of Victoria, and one of Australia's largest and most important cities
Jan 25 Henri de Brouckère a Belgian nobleman and liberal politician. Born in Bruges, he was a magistrate, and a professor at the Université Libre de Bruxelles. His brother Charles was mayor of Brussels
Jan 29 Johannes Bernardus van Bree a Dutch composer, violinist and conductor.
Jan 29 Horatia Nelson the illegitimate daughter of Emma Hamilton and Horatio Nelson.
Jan 30 Pierre-Jean De Smet a Belgian Roman Catholic priest and member of the Society of Jesus , active in missionary work among the Native Americans of the Midwestern United States in the mid-19th century.
Feb 1 Jean Théodore Lacordaire a Belgian entomologist of French extraction.
Feb 1 Thomas Cole an American artist. He is regarded as the founder of the Hudson River School, an American art movement that flourished in the mid-19th century. Cole's Hudson River School, as well as his own work, was known for its realistic and detailed portrayal of American landscape and wilderness, which feature themes of romanticism
Feb 1 Émile Littré a French lexicographer and philosopher, best known for his Dictionnaire de la langue française, commonly called "The Littré".
Feb 6 Laure Cinti-Damoreau a French soprano particularly associated with Rossini roles.
Feb 7 Wilhem de Haan a Dutch zoologist. He specialised in the study of insects and crustaceans, and was the first keeper of invertebrates at the Rijksmuseum in Leiden, now Naturalis. He was forced to retire in 1846, when he was partially paralysed by a spinal disease. He was responsible for the invertebrate volume of Siebold's Fauna Japonica, which was published in 1833, and introduced the western world for the first time to Japanese wildlife. He named a great many new taxa, and several taxa are named in his honour
Feb 11 Antônio de Sousa Neto a Tatter Revolutionary leader. On 20 September 1836, Neto declared the independence of the Piratini Republic
Feb 16 Julius Theodor Christian Ratzeburg a German zoologist, botanist, entomologist, and forester.
Feb 21 Heinrich Leberecht Fleischer a German Orientalist.
Feb 21 Jan Kalivoda a composer, conductor and violinist of Bohemian birth.
Feb 21 John Henry Newman an important figure in the religious history of England in the 19th century. He was known nationally by the mid-1830s
Feb 22 Marc Girardin a French politician and man of letters, whose real name was Marc Girardin.
Feb 22 William Barnes an English writer, poet, Church of England minister, and philologist. He wrote over 800 poems, some in Dorset dialect, and much other work, including a comprehensive English grammar quoting from more than 70 different languages
Mar 4 Karl Rudolf Hagenbach a Swiss church theologian and historian. He was particularly interested in the Protestant Reformation and its figures
Mar 14 Kristjan Jaak Peterson an Estonian poet, commonly regarded as a herald of Estonian national literature and the founder of modern Estonian poetry. His literary career was cut short by the tuberculosis that killed him at the age of 21. His birthday on March 14 is celebrated in Estonia as the Mother Tongue Day
Mar 15 George Perkins Marsh considered by some to be America's first environmentalist and the precursor to the sustainability concept, although "conservationist" would be more accurate. The Marsh-Billings-Rockefeller National Historical Park in Vermont takes its name, in part, from Marsh
Mar 17 Pius Zingerle an Austrian Orientalist.
Mar 19 Salvadore Cammarano a prolific Italian librettist and playwright perhaps best known for writing the text of Lucia di Lammermoor for Gaetano Donizetti.
Mar 21 Maria Theresa of Austria (1801–1855) born an Archduchess of Austria and Princess of Tuscany. In 1817 she married and became the Queen of Sardinia. She was the wife of King Charles Albert of Sardinia and a daughter of Ferdinand III, Grand Duke of Tuscany, and Luisa of Naples and Sicily. She was named after her double great grandmother Empress Maria Theresa
Mar 27 Alexander Barrow a lawyer and United States Senator from Louisiana. He was a member of the Whig Party. He was the half-brother of Washington Barrow, the son of his father and his second wife
Mar 28 Karl Friedrich Knorre best known for founding the Nikolayev Astronomical Observatory in 1827. Knorre's father, Ernst Friedrich Knorre, and his son, Viktor Knorre, were also prominent astronomers. Recently NASA named an asteroid in honor of the three generations of Knorre astronomers
Apr 5 Vincenzo Gioberti an Italian philosopher, publicist and politician.
Apr 6 Hugh Rose 1st Baron Strathnairn a senior British Army officer. He served as a military adviser to the Ottoman Army who were seeking to secure the expulsion of the forces of Mehemet Ali from Syria during the Egyptian–Ottoman War. He then fought with the French Army at the Battle of Alma, the Battle of Inkerman and at the Battle of Mamelon during the Crimean War. During the Indian Mutiny Rose was given command of the Central Indian Field Force and secured the defeat of the mutineers at Jhansi in April 1858, at Lahore in May 1858 and at Gwalior in June 1858. He went on to be Commander of the Bombay Army, Commander-in-Chief, India and then Commander-in-Chief, Ireland
Apr 8 Archduchess Marie Caroline of Austria Ferdinanda of Austria, Crown Princess of Saxony.
Apr 8 Eugène Burnouf an eminent French scholar and orientalist who made significant contributions to the deciphering of Old Persian cuneiform.
Apr 9 Viktor Nikitich Panin conservative Russian Minister of Justice.
Apr 10 Julius Müller a German Protestant theologian.
Apr 10 Princess Mathilde of Waldeck and Pyrmont a member of the House of Waldeck and Pyrmont and a Princess of Waldeck and Pyrmont and a member of the House of Württemberg and a Duchess of Württemberg through her marriage to Duke Eugen of Württemberg.
Apr 12 Joseph Lanner an Austrian dance music composer. He is best remembered as one of the earliest Viennese composers to reform the waltz from a simple peasant dance to something that even the highest society could enjoy, either as an accompaniment to the dance, or for the music's own sake. He was just as famous as his friend and musical rival Johann Strauss I, who was better known outside of Austria in their day because of his concert tours abroad, in particular, to France and England
Apr 14 Fedor Solntsev a Russian painter and historian of art. His artwork was a major contribution in recording and preserving medieval Russian culture, which was a common subject of his paintings. He was the main author of the fundamental work Antiquities of Russian Stata , the main decorator of interiors of the Grand Kremlin Palace in Moscow. He discovered and restored mosaics and frescoes of Saint Sophia's Cathedral and Cathedral of the Dormition of Kiev Pechersk Lavra in Kiev, and of Cathedral of Saint Demetrius in Vladimir. Fedor Solntsev, together with Metropolitan Philaret and Archimandrite Photius Spassky are considered the founders of modern Russian icon painting canon synthesizing ancient Russian traditions, post-Petrine efforts and modern art discoveries
Apr 19 Gustav Fechner a German philosopher, physicist and experimental psychologist. An early pioneer in experimental psychology and founder of psychophysics, he inspired many 20th century scientists and philosophers. He is also credited with demonstrating the non-linear relationship between psychological sensation and the physical intensity of a stimulus via the formula: , which became known as the Weber–Fechner law
Apr 22 Infanta Maria Francisca of Portugal a Portuguese infanta daughter of King John VI of Portugal and his spouse Carlota Joaquina of Spain.
Apr 24 Marthe Camille Bachasson Count of Montalivet a French statesman and a Peer of France.
Apr 26 Ambrose Dudley Mann the first United States Assistant Secretary of State and a commissioner for the Confederate States.
Apr 29 Joseph Aschbach a German historian who studied the Visigoths, writing "Geschichte der Westgoten" in 1827.
May 6 José Joaquín Pérez a Chilean political figure. He served as the president of Chile between 1861 and 1871
May 6 George S. Greene a civil engineer and a Union general during the American Civil War. He was part of the Greene family of Rhode Island, which had a distinguished military record for the United States. He first served in the Army from 1823 to 1836 after graduating second from his class at West Point. As a civilian, he was a founder of the American Society of Civil Engineers and Architects and was responsible for numerous railroads and aqueduct construction projects in the northeastern United States
May 6 Philippe Grass a French sculptor.
May 9 Peter Hesketh-Fleetwood an English landowner, developer and Member of Parliament, who founded the town of Fleetwood, in Lancashire, England. Born Peter Hesketh, he changed his name by Royal assent to Hesketh-Fleetwood, incorporating the name of his ancestors, and was later created Baronet Fleetwood. Predeceased by an older brother, he inherited estates in west Lancashire in 1824. Inspired by the transport developments of the early 19th century, he decided to bring the railway to the Lancashire coast and develop a holiday resort and port. He hired architect Decimus Burton to design his new town, which he named Fleetwood; construction began in 1836. Hesketh-Fleetwood was instrumental in the formation of the Preston and Wyre Railway Company and with his financial support, a railway line was built between Preston and Fleetwood which opened in 1840
May 9 Samuel Cousins an English mezzotint engraver.