| 54181 | May.11 | Birth | 1994 – Hagos Gebrhiwet, Ethiopian runner |
| 54182 | May.11 | Birth | 1999 – Sabrina Carpenter, American actress and singer |
| 54183 | May.11 | Death | 912 – Leo VI the Wise, Byzantine emperor (b. 866) |
| 54184 | May.11 | Death | 1304 – Ghazan, Mongolian ruler (b. 1271) |
| 54185 | May.11 | Death | 1610 – Matteo Ricci, Italian priest and mathematician (b. 1552) |
| 54186 | May.11 | Death | 1672 – Charles Seton, 2nd Earl of Dunfermline, Scottish politician (b. 1615) |
| 54187 | May.11 | Death | 1686 – Otto von Guericke, German physicist and politician (b. 1602) |
| 54188 | May.11 | Death | 1696 – Jean de La Bruyère, French philosopher and author (b. 1645) |
| 54189 | May.11 | Death | 1708 – Jules Hardouin-Mansart, French architect, designed the Château de Dampierre and Grand Trianon (b. 1646) |
| 54190 | May.11 | Death | 1723 – Jean Galbert de Campistron, French playwright and author (b. 1656) |
| 54191 | May.11 | Death | 1760 – Alaungpaya, Burmese king (b. 1714) |
| 54192 | May.11 | Death | 1777 – George Pigot, 1st Baron Pigot, English politician (b. 1719) |
| 54193 | May.11 | Death | 1778 – William Pitt, 1st Earl of Chatham, English soldier and politician, Prime Minister of the United Kingdom (b. 1708) |
| 54194 | May.11 | Death | 1779 – John Hart, American lawyer and politician (b. 1711) |
| 54195 | May.11 | Death | 1812 – Spencer Perceval, English lawyer and politician, Prime Minister of the United Kingdom (b. 1762) |
| 54196 | May.11 | Death | 1848 – Tom Cribb, English boxer (b. 1781) |
| 54197 | May.11 | Death | 1849 – Juliette Récamier, French businesswoman (b. 1777) |
| 54198 | May.11 | Death | 1871 – John Herschel, English mathematician, astronomer, and chemist (b. 1792) |
| 54199 | May.11 | Death | 1878 – Henry Norris, English civil engineer (b. 1816) |
| 54200 | May.11 | Death | 1887 – Jean-Baptiste Boussingault, French chemist and academic (b. 1802) |
| 54201 | May.11 | Death | 1889 – John Cadbury, English businessman and philanthropist, founded the Cadbury Company (b. 1801) |
| 54202 | May.11 | Death | 1891 – Edmond Becquerel, French physicist and academic (b. 1820) |
| 54203 | May.11 | Death | 1916 – Max Reger, German pianist, composer, and conductor (b. 1873) |
| 54204 | May.11 | Death | 1916 – Karl Schwarzschild, German astronomer and physicist (b. 1873) |
| 54205 | May.11 | Death | 1920 – James Colosimo, Italian-American mob boss (b. 1878) |
| 54206 | May.11 | Death | 1920 – William Dean Howells, American author and critic (b. 1837) |
| 54207 | May.11 | Death | 1927 – Juan Gris, Spanish painter and sculptor (b. 1887) |
| 54208 | May.11 | Death | 1929 – Jozef Murgaš, Slovak-American priest, architect, botanist, and painter (b. 1864) |
| 54209 | May.11 | Death | 1934 – Blaise Diagne, Senegalese-French soldier and politician (b. 1872) |
| 54210 | May.11 | Death | 1934 – Orest Khvolson, Russian physicist and academic (b. 1852) |