Born on April 11

145 Septimius Severus Roman emperor from 193 to 211. Severus was born in Leptis Magna in the Roman province of Africa. As a young man he advanced through the cursus honorum—the customary succession of offices—under the reigns of Marcus Aurelius and Commodus. Severus seized power after the death of Emperor Pertinax in 193 during the Year of the Five Emperors
999 Bao Zheng a government officer during the reign of Emperor Renzong in ancient China's Song Dynasty. During his twenty five years in civil service, Bao consistently demonstrated extreme honesty and uprightness, with actions such as sentencing his own uncle, impeaching an uncle of Emperor Renzong's favourite concubine and punishing powerful families. His appointment from 1057 to 1058 as the prefect of Song's capital Kaifeng, where he initiated a number of changes to better hear the grievances of the people, made him a legendary figure
1026 Theodoric I Duke of Upper Lorraine the count of Bar and duke of Upper Lorraine from 978 to his death. He was the son and successor of Frederick I and Beatrice, daughter of Hugh the Great, count of Paris, and sister to the French king Hugh Capet
1184 William of Winchester Lord of Lüneburg the fifth and youngest son of Duke Henry the Lion and Matilda of England, Duchess of Saxony, the eldest daughter of Henry II of England.
1358 John I of Portugal King of Portugal and the Algarve in 1385–1433. He was called the Good or of Happy Memory, more rarely and outside Portugal, in Spain, the Bastard, and was the first to use the title Lord of Ceuta. He preserved the kingdom’s independence from Castile
1370 Frederick I Elector of Saxony Margrave of Meissen and Elector of Saxony from 1381 until his death. He is not to be confused with his cousin Frederick IV, Landgrave of Thuringia, the son of Balthasar, Landgrave of Thuringia. Frederick the Warlike was never Landgrave of Thuringia
1374 Roger Mortimer 4th Earl of March considered the heir presumptive to King Richard II.
1492 Marguerite de Navarre the princess of France, Queen of Navarre, and Duchess of Alençon and Berry. She was married to Henry II of Navarre. Her brother became King of France, as Francis I and the two siblings were responsible for the celebrated intellectual and cultural court and salons of their day in France
1592 John Eliot (statesman) an English statesman who was serially imprisoned in the Tower of London, where he eventually died, by King Charles I for advocating the rights and privileges of Parliament.
1598 William Duke of Saxe-Weimar a duke of Saxe-Weimar.
1611 Karl Eusebius Prince of Liechtenstein the Prince of Liechtenstein. He inherited this title in 1627 from his father Karl He was 16 and thus considered underage and his uncles Prince Gundakar and Maximillian acted as regents until 1632. From 1639 to 1641 Karl was Chief Captain of High and Low Silesia
1614 Helena Fourment the second wife of Peter Paul Rubens. She was the subject of a few portraits by Rubens, and also modeled for other religious and mythological paintings
1623 Decio Azzolino an Italian Catholic Cardinal, code-breaker, investigator and leader of the Squadrone Volante.
1644 Marie Jeanne Baptiste of Savoy-Nemours born a Princess of Savoy and was later the Duchess of Savoy. Married by proxy to Charles of Lorraine in 1662, Lorraine soon refused to recognise the union. Despite this, she married Charles Emmanuel II, Duke of Savoy in 1665 who was her second cousin once removed. The mother of the future Victor Amadeus II of Sardinia who saw the elevation of the House of Savoy to kings, she styled herself as Madama Reale or Madame Royale and acted as Regent of Savoy from 1675 in the name of her son Victor Amadeus II who was his successor. Her regency officially ended in 1680 but she maintained power for four years until her son banished her from further influence in the state. She left a considerable architectural legacy in Turin and was responsible for the remodelling of the Palazzo Madama which was her private residence. At the time of her death she was the mother of the King of Sardinia as well as great grandmother of the King of Spain and King of France
1649 Princess Frederica Amalia of Denmark the second daughter of King Frederick III of Denmark and Sophie Amalie of Brunswick-Lüneburg, and Duchess of Holstein-Gottorp from 1667 to 1695 as the consort of Duke Christian Albert.
1658 James Hamilton 4th Duke of Hamilton a Scottish nobleman, the Premier Peer of Scotland and Keeper of the Palace of Holyroodhouse. He was a Master of the Great Wardrobe, Master-General of the Ordnance, Ambassador, and Colonel-in-Chief of his regiment. Hamilton was a major investor in the failed Darien Scheme, which cost many of Scotland's ruling class their fortunes, and he played a leading role in the events leading up to the Act of Union in 1707. He died on 15 November 1712 as the result of a duel in Hyde Park, Westminster, with Charles Mohun, 4th Baron Mohun, over a disputed inheritance
1661 Antoine Coypel a history painter, the more famous son of the French painter Noël Coypel.
1682 Jean-Joseph Mouret a French composer whose dramatic works made him one of the leading exponents of Baroque music in his country. Even though most of his works are no longer performed, Mouret's name survives today thanks to the popularity of the Fanfare-Rondeau from his first Suite de symphonies, which has been adopted as the signature tune of the PBS program Masterpiece and is a popular musical choice in many modern weddings
1715 John Alcock (organist) an English organist and composer. He wrote instrumental music, glees and much church music
1721 David Zeisberger a Moravian clergyman and missionary among the Native Americans in the Thirteen Colonies. He established communities of Munsee converts in the valley of the Muskingum River in Ohio; and for a time, near modern-day Amherstburg, Ontario
1722 Christopher Smart an English poet. He was a major contributor to two popular magazines and a friend to influential cultural icons like Samuel Johnson and Henry Fielding. Smart, a high church Anglican, was widely known throughout London
1749 Adélaïde Labille-Guiard a French miniaturist and portrait painter.
1755 James Parkinson an English surgeon, apothecary, geologist, palaeontologist, and political activist. He is most famous for his 1817 work, An Essay on the Shaking Palsy in which he was the first to describe "paralysis agitans", a condition that would later be renamed Parkinson's disease by Jean-Martin Charcot
1766 Antoni Michał Potocki the Lieutenant-General of the Crown Army of Poland in 1754, voivode of Belz between 1732 to 1763, and the Lithuanian Great Deputy Master of the Pantry.
1767 Jean-Baptiste Isabey a French painter born at Nancy.
1769 František Vladislav Hek a Czech patriot active in early phases of the Czech National Revival, writer and composer. He has novel L. Věk by Alois Jirásek
1770 George Canning a British statesman and politician who served as Foreign Secretary and was briefly Prime Minister.
1772 Manuel José Quintana a Spanish poet and man of letters. He was born at Madrid. After completing his studies at Salamanca he was called to the bar
1780 Léon Jean Marie Dufour a French medical doctor and naturalist.
1794 Edward Everett an American politician, pastor, educator, diplomat, and orator from Massachusetts. Everett, a Whig, served as U.S. Representative, U.S. Senator, the 15th Governor of Massachusetts, Minister to Great Britain, and United States Secretary of State. He also taught at Harvard University and served as its president
1798 Alfred V. du Pont an American chemist and industrialist, who was the eldest son and successor of Eleuthère Irénée du Pont, the founder of the E.I. du Pont de Nemours and Company.
1798 Macedonio Melloni an Italian physicist, notable for demonstrating that radiant heat has similar physical properties to those of light.
1803 Dimitri Gruzinsky a Georgian prince of the House of Bagrationi, the youngest son of Prince Iulon of Georgia and his wife, Princess Salome née Amilakhvari.
1804 Otto Linné Erdmann a German chemist. He was the son of Karl Gottfried Erdmann, the physician who introduced vaccination into Saxony. He was born in Dresden on 11 April 1804. In 1820 he began to attend the medicochirurgical academy of his native place, and in 1822 he entered the University of Leipzig, where in 1827 he became extraordinary professor, and in 1830 ordinary professor of chemistry. This office he held until his death, which happened at Leipzig on 9 October 1869. He was particularly successful as a teacher, and the laboratory established at Leipzig under his direction in 1843 was long regarded as a model institution. As an investigator he is best known for his work on nickel and indigo and other dye-stuffs. With F. Marchand he also carried out a number of determinations of atomic weights. In 1828, in conjunction with F. Werther , he founded the Journal für technische and ökonomische Chemie, which became in 1834 the Journal für praktische Chemie. He was also the author of Über das Nickel , Lehrbuch der Chemie , Grundriss der Waarenkunde , and Über das Studium der Chemie
1806 Pierre Guillaume Frédéric le Play a French engineer, sociologist and economist.
1806 Robert Bigsby an English antiquarian and author.
1806 Count Anton Alexander von Auersperg an Austrian poet and liberal politician from Carniola.
1810 Johann Rudolf Kutschker an Austrian Cardinal.
1810 Victor Motschulsky a Russian entomologist mainly interested in beetles.
1813 Carl Jaenisch a Finnish and Russian chess player and theorist. In the 1840s, he was among the top players in the world
1818 Constantin von Wurzbach an Austrian biographer.
1819 Charles Hallé an Anglo-German pianist and conductor, and founder of The Hallé orchestra in 1858.
1819 Philip Pearsall Carpenter Rev. who in 1841, was ordained Presbyterian minister in England, and a Doctorate of Philosophy in 1860, and whose field work as a malacologist or conchologist in North America is still well regarded today. A man of many talents, he wrote, published, taught, and was a volunteer explaining the growing study of shells in North America
1820 Henry Aaron Stern an Anglican missionary and captive in Abyssinia.
1820 Hermann Knoblauch a German physicist. He is most notable for his studies of radiant heat. He was one of the six founding members of the Deutsche Physikalische Gesellschaft at Berlin on 14 January 1845
1823 Charles Seaforth Stewart a Colonel in the United States Army Corps of Engineers. He graduated first in his West Point class of 1846 with George McClellan, Stonewall Jackson, and George Pickett
1824 Johanna von Puttkamer a Prussian noblewoman, also known as Johanna von Bismarck. She was the sister of statesman Robert von Puttkamer
1825 Ferdinand Lassalle a German-Jewish jurist, philosopher, and socialist political activist. Lassalle is best remembered as an initiator of international-style socialism in Germany
1827 Jyotirao Phule an Indian activist, thinker, social reformer, writer and theologist from Maharashtra. He and his wife, Savitribai Phule, were pioneers of women's education in India. His work extended to many fields including education, agriculture, caste system, women and widow upliftment and removal of untouchability. He is most known for his efforts to educate women and the lower castes as well as the masses. He, after educating his wife, opened the first school for girls in India in August 1848
1827 James Augustus Grant a Scottish explorer of eastern equatorial Africa.