Born in 1799

Jan 1 Andrzej Towiański a Polish philosopher and Messianist religious leader.
Jan 6 Jedediah Smith a hunter, trapper, fur trader, trailblazer, author, cartographer and explorer of the Rocky Mountains, the American West Coast and the Southwest during the 19th century. Nearly forgotten by historians almost a century after his death, Smith has been rediscovered as an American hero who was the first white man to travel overland from the Salt Lake frontier, the Colorado River, the Mojave Desert, and finally into California. Smith was the first United States citizen to explore and eastwardly cross the Sierra Nevada and the treacherous Great Basin. Smith also was the first American to travel up the California coast to reach the Oregon Country. Not only was he the first to do this, but he and Robert Stuart discovered the South Pass. This path became the main route used by pioneers to travel to the Oregon Country. Surviving three massacres and one bear mauling, Jedediah Smith's explorations and documented discoveries were highly significant in opening the American West to expansion by white settlers and cattlemen. In 1831, while searching for water off the Santa Fe Trail, Smith was mortally wounded by Commanche warriors
Jan 6 Nicolas Eugène Géruzez a French critic.
Jan 9 Arvid Adolf Etholén a naval officer, explorer and administrator who was employed by the Russian-American Company. He was a Swedish-speaking Finn who was born in Helsinki, Finland. Etholén first reached Sitka in the service of the Russian-American Company in 1818, rising to Chief Manager of the Company 1840-1845
Jan 13 Antoine Laurent Bayle a French physician born in Le Vernet, Alpes-de-Haute-Provence. He was a nephew to pathologist Gaspard Laurent Bayle
Jan 17 Adolph Theodor Kupffer a German-Baltic chemist, and physicist. He founded the Depot of Standard Weights and Measures, and the main physical Observatory in Russia
Jan 22 Ludger Duvernay born in Verchères, Quebec, Canada.
Jan 31 Rodolphe Töpffer a Swiss teacher, author, painter, cartoonist, and caricaturist. He is best known for his illustrated books, which can be seen as the earliest European comics
Feb 3 Omar Ali Saifuddin II the 23rd Sultan of Brunei.
Feb 4 Almeida Garrett a Portuguese poet, playwright, novelist and politician. He is considered to be the introducer of the Romanticism in Portugal. He is regarded as one of history's greatest romantics and a true revolutionary and humanist
Feb 5 John Lindley an English botanist, gardener and orchidologist.
Feb 6 George Arnott Walker-Arnott a Scottish botanist.
Feb 6 Imre Frivaldszky a Hungarian botanist and entomologist.
Feb 11 Basil Moreau the French priest who founded the Congregation of Holy Cross from which three additional congregations were founded, namely the Marianites of Holy Cross, the Sisters of the Holy Cross, and the Sisters of Holy Cross. Father Moreau was beatified on September 15, 2007 in Le Mans, France
Feb 14 Walenty Wańkowicz a Belarusian painter.
Feb 16 Heinrich von Kittlitz a German artist, naval officer, explorer and naturalist. He was a descendant of a family of old Prussian nobility
Feb 16 François Dauverné a French trumpeter who in 1827 was the first to use the new F three valved trumpet in public performance. Dauverné was amongst the first to realise the potential of the newly invented valve trumpet after its arrival in Paris from Berlin and is credited with persuading several composers to write for it including Berlioz and Rossini
Feb 18 Philipp Johann Ferdinand Schur a German-Austrian pharmacist and botanist born in Königsberg.
Feb 19 Ferdinand Reich a German chemist who co-discovered indium in 1863 with Hieronymous Theodor Richter.
Feb 24 Siegfried Dehn a German music theorist, editor, teacher and librarian.
Feb 26 Benoît Paul Émile Clapeyron a French engineer and physicist, one of the founders of thermodynamics.
Feb 27 Frederick Catherwood an English artist and architect, best remembered for his meticulously detailed drawings of the ruins of the Maya civilization. He explored Mesoamerica in the mid 19th century with writer John Lloyd Stephens. Their books, Incidents of Travel in Central America, Chiapas and Yucatán and Incidents of Travel in Yucatán, were best sellers and introduced to the Western world the civilization of the ancient Maya. In 1837, Catherwood was elected into the National Academy of Design as an Honorary member
Feb 27 Edward Belcher a Nova Scotian, British naval officer and explorer. He was the great-grandson of Governor Jonathan Belcher. His wife, Diana Jolliffe, was the stepdaughter of Captain Peter Heywood
Feb 28 Samuel Simon Schmucker a German-American Lutheran pastor and theologian. He was integral to the founding of the Lutheran church body known as the General Synod, as well as the oldest continuously-operating Lutheran seminary and college in North America
Feb 28 Franz Faldermann a German entomologist who specialised in Coleoptera.
Feb 28 Ignaz von Döllinger a German theologian, Catholic priest and church historian who rejected the dogma of papal infallibility. He is considered an important contributor to the doctrine, growth and development of the Old Catholic Church, though he himself never joined that denomination
Mar 1 Jonathan Carl Zenker a German naturalist born in Sundremda, located in the Saalfeld-Rudolstadt district.
Mar 1 Alexey Verstovsky a Russian composer, musical bureaucrat and rival of Mikhail Glinka.
Mar 8 Simon Cameron an American politician who served as United States Secretary of War for Abraham Lincoln at the start of the American Civil War. Cameron made his fortune in railways, canals and banking, founding the Bank of Middletown. He then turned to a life of politics. He became a U.S. senator in 1845 for the state of Pennsylvania, succeeding James Buchanan. Originally a Democrat, he failed to secure a nomination for senator from the Know-Nothing party, and joined the People's Party, the Pennsylvania branch of what became the Republican Party. He won the Senate seat in 1857, and became one of the candidates for the Republican nomination in the presidential election of 1860
Mar 16 Anna Atkins an English botanist and photographer. She is often considered the first person to publish a book illustrated with photographic images. Some sources claim that she was the first woman to create a photograph
Mar 17 Heinrich Leo a Prussian historian born in Rudolstadt, his father being chaplain to the garrison there.
Mar 19 William Rutter Dawes an English astronomer.
Mar 20 Karl August Nicander a Swedish lyric poet.
Mar 21 Charles Meyer a Prussian pianist and composer active in the early 19th century. He studied with John Field and was the piano teacher of Russian composer Mikhail Glinka and Polish composer Filipina Brzezinska-Szymanowska
Mar 22 Henrik Nikolai Krøyer a Danish zoologist.
Mar 22 Friedrich Wilhelm Argelander a German astronomer. He is known for his determinations of stellar brightnesses, positions, and distances
Mar 23 Joshua Baker the 22nd Governor of Louisiana during Reconstruction.
Mar 25 Jakub Kryštof Rad a Swiss-born Czech entrepreneur who invented the sugar cubes in 1843 as a director of a sugar factory in Dačice in Moravia.
Mar 27 Alessandro Ferrero La Marmora best remembered for founding the military unit known as the Bersaglieri. His brother was Alfonso Ferrero La Marmora
Mar 28 Karl Adolph von Basedow a German physician most famous for reporting the symptoms of what could later be dubbed Graves-Basedow disease, now technically known as exophthalmic goiter.
Mar 29 Edward Smith-Stanley 14th Earl of Derby an English statesman, three times Prime Minister of the United Kingdom, and to date the longest serving leader of the Conservative Party. He was known before 1834 as Edward Stanley, and from 1834 to 1851 as Lord Stanley. His record was unusual, since he is one of only four British Prime Ministers to have three or more separate periods in office. However his ministries all lasted less than two years, and totalled 3 years 280 days
Apr 5 Jacques Denys Choisy a Swiss Protestant clergyman and botanist.
Apr 12 Henri Druey a Swiss politician of the 19th century and a founding father of constitutional democracy in Switzerland.
Apr 13 Ludwig Rellstab a German poet and music critic. He was born and died in Berlin. He was the son of the music publisher and composer Johann Carl Friedrich Rellstab. An able pianist, he published articles in various periodicals, including the influential liberal Vossische Zeitung, and launched the music journal Iris im Gebiete der Tonkunst, which was published in Berlin from 1830 to 1841. His outspoken criticism of the influence in Berlin of Gaspare Spontini landed him in jail in 1837
Apr 18 François Mathias René Leprieur a French pharmacist and naturalist. Throughout his career, he collected specimens in the fields of entomology, ichthyology and botany
Apr 19 Wojciech Jastrzębowski a Polish scientist, naturalist and inventor, professor of botanic, physics, zoology and horticulture at Instytut Rolniczo-Leśny in Marymont in Warsaw. He was one of the fathers of ergonomics
Apr 21 Mihály Táncsics a Hungarian writer, teacher, journalist and politician.
May 8 Konstantin Igelström Gustavovich Igelström Russian Decembrist from the noble Swedish family of Igelström.
May 10 Christodoulos Hatzipetros a Greek military leader during the Greek War of Independence, who became a general and adjutant to King Otto of Greece after Independence.
May 10 François-Isidore Gagelin a French missionary of the Paris Foreign Missions Society in Vietnam. He died a martyr, and became the first French martyr of the 19th century in Vietnam. He was born in Montperreux, Doubs. He left for Vietnam in 1821. In 1826, when Emperor Minh Mạng ordered all missionaries to gather at the capital Huế, he fled to the south to Đồng Nai in Cochinchina. He was captured once and released