1801 births

Joseph Jean Baptiste Xavier Fournet (May 15, 1801 – January 8, 1869), French geologist and metallurgist, was born at Strasbourg.
He was educated at the École des Mines in Paris, and after considerable experience as a mining engineer he was in 1834 appointed professor of geology at Lyon.
He was a man of wide knowledge and extensive research, and wrote memoirs on chemical and mineralogical subjects, on eruptive rocks, on the structure of the Jura, the metamorphism of the Western Alps, on the formation of oolitic limestones, on kaolinization and on metalliferous veins. On metallurgical subjects he also was an acknowledged authority; and he published observations on the order of sulphurability of metals (loi de Fournet).
He died in Lyon. His chief publications were: Études sur les dépôts métallifères (Paris, 1834); Histoire de la dolomie (Lyon, 1847); De l'extension des terrains houillers (1855); and Géologie lyonnaise (Lyon, 1861).

Félix Dujardin (5 April 1801 – 8 April 1860) was a French biologist born in Tours. He is remembered for his research on protozoans and other invertebrates.

Carl August von Steinheil (12 October 1801 – 14 September 1870) was a German physicist, inventor, engineer and astronomer.

Johanna Friederika Henriette Katharina Davidis (1 March 1801 in Wengern – 3 April 1876 in Dortmund) arguably is Germany's most famous cookbook author. Although many similar cookbooks had been published by then, amongst others Sophie Wilhelmine Scheibler's Allgemeines deutsches Kochbuch für bürgerliche Haushaltungen in several editions, Davidis' Praktisches Kochbuch (Practical Cookbook) became the reference cookbook of the late 19th and early 20th century, a standard in German households. The large number of second-hand copies still available, frequently heavily annotated, are proof that the books were in much use. In many families Praktisches Kochbuch was handed down through the generations.
However the cookbook was only one facet of the extensive educational program Davidis devised for young women. Starting with the Puppenköchin (Dolls' Cook) for very young girls on to young unmarried women, and finally housewives responsible for their own household and servants, Davidis' books offered advice and information. This was rooted in the conviction that being a housewife was a demanding activity in its own right for which young women of the middle class emerging at the time were frequently ill-prepared.
While authoring her books Davidis first worked as a home economist, teacher, and governess, but later on concentrated exclusively on writing. Although her books, in particular Praktisches Kochbuch which had reached its 21st edition when she died, were hugely successful even during her lifetime, she had to live very modestly and only at the age of 74 years was able to afford her own flat. Occasionally sources claim "Henriette Davidis" to be the pseudonym used by a certain Helena Clemen. However Helena Clemen was one of Davidis' readers who had sent in suggestions which the author used in her writings.Today the Henriette-Davidis-Museum in Wetter-Wengern keeps her memory alive with cookbook exhibitions and a monograph series. Parts of a stone-built stove from the Wengern vicary together with a memorial plaque were bricked in the local railway bridge abutments, completed in 1934 and for which the vicary had to be demolished.
Due to her huge influence on German food culture and household management she is generally considered to be the German equivalent to Mrs Beeton. The first edition of her classic cookbook Praktisches Kochbuch für die gewöhnliche und feinere Küche was published in 1844 and there were at least seventy-six editions published by 1963.

(Hyppolyte) Louis Alexandre Dechet (alternatively, spelled Dechez; Lyon, 20 January 1801 - Lier, 18 October 1830) was a French actor and is 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 (1769) of Louis Sébastien Mercier.
Dechet worked in Ajaccio, Marseille and in 1826 at the Paris Odéon. Via Lille he finally came to Brussels, where he played at La Monnaie. In 1828 he returned to Paris in order to work at the Comédie Française, but returned to Brussels immediately after the July Revolution in 1830. He there served with the city guard which was responsible for maintaining law and order.
Dechet is said to have written the text of the Brabançonne during the first revolutionary gatherings at the café "L'Aigle d'Or" in the Brussels Greepstraat in August 1830, shortly after the performance of the opera La Muette de Portici, which triggered the Belgian revolution.
During the Belgian Revolution Dechet became a volunteer in the revolutionary army and joined the corps of Frenchman Charles Niellon. He died during a combat against the Dutch near Lier.
On the Place des Martyrs/Martelaarsplein in Brussels, a column honouring Dechet is to be found, which was created by the sculptor Alfred Crick and inaugurated in 1897.

Pierre-Martinien Tousez, better known by his stage name Bocage, (Rouen, November 11, 1799–Paris, August 30, 1862) was a French actor.
Born into a poor family of laborers, Bocage was, early on, forced to work in a weaving factory in order to earn an income. Having learned how to read and write without going to school, he began to read, from an early age, the works of Shakespeare. He had an opportunity to get on the stage, and he decided to head on to Paris on foot, in order to fulfill his dreams of being an actor. There he entered the Paris Conservatoire, but had to leave it because his financial resources could not afford him the cost of tuition.
Handsome, talented but undisciplined, he went through a difficult start and had to spend several years on obscure provincial stages, before he joined the cast of the Porte Saint-Martin. In Paris, he was attached to the various dramatic theaters, and became extremely popular as a major interpreter of romantic creations: Antony, Marion Delorme, The Tour de Nesle, Don Juan de Marana, etc. He acted with great distinction and a passionate energy.
In the 1830s, Bocage was, with Michel de Bourges, her divorce lawyer and the Swiss writer Charles Didier, amongst George Sand's lovers.
As a member of the Comédie-Française, Bocage also played the classical repertoire, and he appeared as late as 1819 in La Vieillesse de Richelieu. Bocage also was a member of the Théâtre de l'Odéon, becoming its director in 1845. A politically active citizen, Bocage mingled into the literary movement of his time with a zeal that endowed him with an influence that he tried to put to use during the French Revolution of 1848. He often used his managerial position to have the Odéon's performances serve revolutionary propaganda, and this affected his theatrical career as he was fired from the Odéon in 1848 for anti-government activities.
In 1854 he appeared in Théâtre du Vaudeville in Le Marbrier, by Alexandre Dumas. In 1855, he staged several roles in Paris by Paul Meurice, at the Théâtre de la Porte Saint-Martin. In 1857, he created the role of Admiral Byng in L'Amiral de l’Escadre Bleue by Paul Foucher, at the Cirque impérial. In 1859 he was appointed manager of the Théâtre Saint-Marcel, where he played in several plays, but that playhouse was too faraway to be successful. In 1861, the aging actor went to play for the Théâtre de Belleville, and he managed to show preeminence in his former role as Buridan.
Shortly before his death, Bocage created the role of the old Duke in Les Beaux Messieurs de Bois-Doré at the Théâtre de l’Ambigu-Comique. He also appeared in Jarvis l’honnête homme, Henri Hamelin and Le Marchand de Londres at the Gymnase.
The National Museum of the Château de Compiègne houses two prints of Bocage by Alphonse-Léon Noël and Benjamin Roubaud. When Bocage's theatrical wardrobe was put up for sale, Virginie Déjazet asked for the dagger that he had used in Alexandre Dumas' Antony, as a most precious souvenir. French writer Paul Bocage was his nephew.

Louis Napoléon Auguste Lannes, 2nd duc de Montebello (30 July 1801 – 18 July 1874) was a French diplomat and politician.

Venceslas Victor Jacquemont (8 August 1801 – 7 December 1832) was a French botanist and geologist known for his travels in India.
Born in Paris on August 8, 1801, Victor Jacquemont was the youngest of four sons of Frédéric François Venceslas Jacquemont de Moreau (1757-1836) and Rose Laisné. He studied medicine and later took an interest in botany. His early travels took him around Europe. He was lightly built and capable of living on a very frugal diet.
After being invited by the Jardin des Plantes to collect plant and animal specimens from a country of his choice for 240 pounds a year, Jacquemont traveled to India leaving Brest in August 1828. He arrived at Calcutta on 5 May 1829. He went to Delhi on 5 March 1830 and went onwards towards the western Himalayas. He visited Amber in Rajputana, met with the Sikh Emperor Ranjit Singh at his capital of Lahore, and visited the kingdom of Ladakh in the Himalaya. He also visited Bardhaman (Burdwan) in Bengal in November 1829. He died of cholera in Bombay on 7 December 1832. The standard author abbreviation Jacquem. is used to indicate this person as the author when citing a botanical name.Several plants are named for him, including Vachellia jacquemontii, the Himalayan White Birch (Betula jacquemontii), the Indian Tree Hazel (Corylus jacquemontii), Afghan Cherry (Prunus jacquemontii), and the cobra lily or Jack in the pulpit (Arisaema jacquemontii).

Antoine Augustin Cournot (French pronunciation: [ɑ̃twan oɡystɛ̃ kuʁno]; 28 August 1801 – 31 March 1877) was a French philosopher and mathematician who also contributed to the development of economics.

Amalie Auguste of Bavaria (13 November 1801, in Munich – 8 November 1877, in Dresden) was a Bavarian princess by birth and Queen of Saxony by marriage to King John of Saxony.