Jean-Robert Argand introduced the term " module " ' unit of measure ' in French in 1806 specifically for the complex absolute value and it was borrowed into English in 1866 as the Latin equivalent " modulus ".

The term " absolute value " has been used in this sense since at least 1806 in French and 1857 in English.

* 1723 – Mathurin Jacques Brisson, French naturalist ( d. 1806 )

In 1806, the French chemists Louis-Nicolas Vauquelin and Pierre Jean Robiquet isolated a compound in asparagus that was subsequently named asparagine, the first amino acid to be discovered.

The monument was designed by Jean Chalgrin in 1806, and its iconographic program pitted heroically nude French youths against bearded Germanic warriors in chain mail.

* 1727 – Michel Adanson, French botanist ( d. 1806 )

Clausewitz served in the Rhine Campaigns ( 1793 – 1794 ) including the Siege of Mainz, when the Prussian army invaded France during the French Revolution, and served in the Napoleonic Wars from 1806 to 1815.

* 1806 – Battles of Pultusk and Golymin: Russian forces hold French forces under Napoleon.

In the Capitulation of Erfurt the city, its 12, 000 defenders, and the Petersberg fortress were handed over to the French on 16 October 1806.

The city became part of the First French Empire in 1806 as Principality of Erfurt, and was returned to Prussia in 1815 after the Napoleonic Wars.

* 1806 – Battle of San Domingo: British naval victory against the French in the Caribbean.

The Confederation of the Rhine, a confederation of client states of the First French Empire, existed from 1806 to 1813.

A pro-French Batavian Republic was established ( 1795 – 1806 ), and with the consolidation of French power under Napoleon gradually turned into a French satellite state, culminating in the Kingdom of Holland ( 1806 – 1810 ) and later simply an imperial province.

; 2nd ed., 1806 ), which was translated into French and served as a model for Wilhelm Adolf Becker's Gallus and Charicles.

* 1806 – Catherine Labouré, French visionary and saint ( d. 1876 )

Mai 1806. jpg | In this 1806 French print, the woman with the Menorah represents the Jews being emancipated by Napoleon Bonaparte

In the course of the Napoleonic Wars, the fortress surrendered to French troops in 1806.

* 1806 – The French Army enters Berlin.

* 1806 – Believing he was facing a much larger force, Prussian Lieutenant General Friedrich von Romberg, commanding 5, 300 men, surrendered the city of Stettin to 800 French soldiers commanded by General Lassalle.

Much of Clausewitz's thinking was based on his experience as a Prussian war planner concerned with how to use popular forces in an insurrectionary struggle against the much-superior French forces which occupied Prussia after 1806 — how, in short, to wage a " Spanish War in Germany.

* 1806 – Christophe Léon Louis Juchault de Lamoricière, French general ( d. 1865 )

* 1806 – Jean-Olivier Chénier, Canadian physician and patriote ( d. 1838 )

* 1806 – Edward Davy, English physician, chemist, and inventor ( d. 1885 )

* Friedrich Armand Strubberg ( 1806 – 1889 ) Merchant, physician, colonist in North America.

* Friedrich Armand Strubberg ( 1806 – 1889 ) Merchant, physician, colonist in North America.

A notable late arrival in Sevierville was Dr. Robert Hodsden ( 1806 – 1864 ), who had been an attending physician for Cherokee Removal ( Trail of Tears ).

* Worthington Hooker ( 1806 – 1867 ), American physician

* December 14-Jean-Olivier Chénier, physician and Patriote ( born 1806 )

Between 1802 and 1806 he travelled in southern Africa, becoming the personal physician of the Governor of the Cape of Good Hope.

* Friedrich Armand Strubberg ( 1806 – 1889 ) Merchant, physician, colonist in North America.

John Williams ( September, 1752 – July 22, 1806 ) was an American physician and politician from Salem, New York.

Edward Davy ( 16 June 1806 – 26 January 1885 ) was an English physician, scientist, and inventor who played a prominent role in the development of telegraphy, and invented an electric relay.

* Duchenne de Boulogne ( 1806 – 1875 ), a French physician who pioneered modern neurology

George Fitzhugh was born on November 4, 1806, to George Fitzhugh Sr. ( a surgeon / physician ) and Lucy Stuart.

Together with two of his brothers, Joseph Anton and Franz Andreas, he was placed in the custody of Norbert Boccius ( 1729 – 1806 ), a physician and botanist who was Prior of the monastery at Feldsberg.

Paul Joseph Barthez ( December 11, 1734 – October 15, 1806 ) was a French physician, physiologist, and encyclopedist who developed a take on the biological theory known as vitalism.

This condition of the nail was named by a French physician, Joseph Honoré Simon Beau ( 1806 – 1865 ), who first described it in 1846.

Baron Ernst von Feuchtersleben ( fully Ernst Maria Johann Karl Freiherr von Feuchtersleben ) ( April 29, 1806 – September 3, 1849 ), was an Austrian physician, poet and philosopher.

The school is named after former Yale University professor and physician Dr. Worthington Hooker ( 1806 – 1867 ).

* November 12 – Jean Joseph Mounier, French politician ( d. 1806 )

By 1806, several " Captain Lafitte " s operated in New Orleans ; Jean Lafitte was likely one of them.

In 1806, Jean Marie Joseph Farina, a grand-grand-nephew of Giovanni Maria Farina ( 1685 – 1766 ), opened a perfumery business in Paris that was later sold to Roger & Gallet.

In 1806, working with asparagus, he and Pierre Jean Robiquet ( future discoverer of the famous red dye alizarin, then a young chemist and his assistant ) isolated the amino acid asparagine, the first one to be discovered.

** Jean Louis Delolme, constitutional writer ( died 1806 )

In March 1806, he married Margaret Maret ( 1784 – 1875 ), daughter of Count Jean Philibert Maret and niece of Hugues-Bernard Maret.

Jean Joseph Mounier ( 12 November 1758 – 28 January 1806 ) was a French politician and judge.

He continued to write on birds, producing Histoire naturelle et générale des colibris, oiseaux-mouches, jacamars et promerops ( 1802 ) with illustrations by his friend Jean Baptiste Audebert, followed by Histoire naturelle des plus beaux oiseaux chanteurs de la zone torride ( 1806 ).

* Jean Honore Fragonard ( French, 1732 – 1806 ) Best known for " The Swing "

( 1767 – 1828 ), Flag Captain under Admiral Jervis, Flag Captain of King George III's Royal Yacht ( 1801-4 ) and Commissioner of Sheerness Dockyard ( 1804-6 ) & Portsmouth Dockyard ( 1806 – 28 ), married Mary Whitbread, daughter of Samuel Whitbread ( 1720-1796 ), whose sons: Sir George Grey, 2nd Baronet ( 1799 – 1882 ) was a British Statesman and Home Secretary, and Charles Samuel Grey, Paymaster of Civil Service in Ireland ; and daughters: Mary married Capt Thomas Monck Mason, Elizabeth married Charles Noel, 1st Earl of Gainsborough, Harriet married Revd John Jenkinson, Hannah Jean married Sir Henry Thompson, 3rd Baronet, Jane married Francis Baring,

* August 19 – Jean Dauberval, dancer ( died 1806 )

* 1806 – Arc de Triomphe, Paris from Jean Chalgrin commissioned by Napoleon Bonaparte.

On 10 October 1806 a united Prussian and Saxon contingent met with a corps of the French Grande Armée under General Jean Lannes at the Battle of Saalfeld, whereby Prince Louis Ferdinand of Prussia was killed.

In 1806 Napoleon I Bonaparte created it a duché grand-fief for general Anne Jean Marie René Savary.

Jean Louis Delolme ( 1740 – 16 July 1806 ) was a Swiss jurist and constitutional writer.

* Jean Charles Dominique de Lacretelle, Précis historique de la Révolution française ( Paris, 1801 – 1806 ).

Jean Reynaud ( 1806, Lyon-1863 ) was a French socialist philosopher.

* Jean Chabot ( 1806 – 1860 ), lawyer, judge and political figure in Canada East

* Jean Dauberval ( 1742 – 1806 ), Ballet master of the Ballet du Théâtre de l ' Académie Royale de Musique from 1781 – 1783, he is known today as the Father of the Comedic ballet

Jean Dauberval, a. k. a. Jean D ’ Auberval, ( born Jean Bercher in Montpellier, France on 19 August 1742 ; and died in Tours, on 14 February 1806 ), was a French dancer and ballet master.