(d. 1876) May 4 – William Fothergill Cooke, English inventor (d. 1879) May 12 – J. V. Snellman, Finnish statesman and an influential Fennoman philosopher (d. 1881) May 20 – John Stuart Mill, British philosopher (d. 1873) June 12 – John Augustus Roebling, German-American engineer (d. 1869) June 27 – Augustus De Morgan, British mathematician, logician (d. 1871) July–December July 5 James Dawson, Scottish-born Australian settler, champion of aboriginal interests (d. 1900) Blanka Teleki, Hungarian countess, women's rights activist (d. 1862) September 12 – Andrew Hull Foote, American admiral (d. 1863) September 22 – Bernardino António Gomes, Portuguese physician and naturalist (d. 1877) October 3 – Oliver Cowdery, American religious leader (d. 1850) October 25 – Max Stirner, German philosopher (d. 1856) November 10 – Sir Alexander Milne, British admiral (d. 1896) November 13 – Emilia Plater, Polish heroine (d. 1831) November 16 – Mary Tyler Peabody Mann, American education reformer and author (d. 1887) December 11 – Otto Wilhelm Hermann von Abich, German geologist (d. 1886) Date unknown Edward Welch, Welsh architect (d. 1868) Silas Gill, Methodist preacher (d. 1875) Anne Clarke, Australian theater manager Black Beaver, Indigenous American (Lenape) trapper, interpreter, scout, and guide (d. 1880) Deaths January–June January 8 – Magdalena Dávalos y Maldonado, Ecuadorian scholar, socialite (b. 1725) January 23 – William Pitt the Younger, Prime Minister of the United Kingdom (b. 1759) February 2 – Rétif de la Bretonne, French writer (b. 1734) February 16 – Franz von Weyrother, Austrian general (b. 1755) February 19 – Elizabeth Carter, English writer (b. 1717) February 20 – Lachlan McIntosh, Scottish-born American military and political leader (b. 1725) March 20 – Salomea Deszner, Polish actress, singer and theater director (b. 1759) March 23 – George Pinto, English composer (b. 1785) March 30 – Georgiana Cavendish, Duchess of Devonshire, English noblewoman, socialite, political organizer, style icon, author and activist (b. 1757) April 9 – William V, Prince of Orange, last Stadtholder of the Dutch Republic (b. 1748) April 10 – Horatio Gates, British soldier, served as an American general during the American Revolutionary War (b. 1727) April 22 – Pierre-Charles Villeneuve, French admiral (stabbed) (b. 1763) May 9 – Robert Morris, English-born merchant, one of the Founding Fathers of the United States, "financier of the American Revolution" (b. 1734) May 24 – John Campbell, 5th Duke of Argyll, British field marshal (b. 1723) June 23 – Mathurin Jacques Brisson,