| 42451 | April 13 | Birth | 1787 – John Robertson, American lawyer and politician (d. 1873) |
| 42452 | April 13 | Birth | 1794 – Jean Pierre Flourens, French physiologist and academic (d. 1867) |
| 42453 | April 13 | Birth | 1802 – Leopold Fitzinger, Austrian zoologist and hepetologist (d. 1884) |
| 42454 | April 13 | Birth | 1808 – Antonio Meucci, Italian-American engineer (d. 1889) |
| 42455 | April 13 | Birth | 1810 – Félicien David, French composer (d. 1876) |
| 42456 | April 13 | Birth | 1824 – William Alexander, Irish archbishop, poet, and theologian (d. 1911) |
| 42457 | April 13 | Birth | 1825 – Thomas D'Arcy McGee, Irish-Canadian journalist and politician (d. 1868) |
| 42458 | April 13 | Birth | 1828 – Joseph Lightfoot, English bishop and theologian (d. 1889) |
| 42459 | April 13 | Birth | 1832 – Juan Montalvo, Ecuadorian author and diplomat (d. 1889) |
| 42460 | April 13 | Birth | 1841 – Louis-Ernest Barrias, French sculptor and academic (d. 1905) |
| 42461 | April 13 | Birth | 1850 – Arthur Matthew Weld Downing, Irish astronomer (d. 1917) |
| 42462 | April 13 | Birth | 1851 – Robert Abbe, American surgeon and radiologist (d. 1928) |
| 42463 | April 13 | Birth | 1851 – William Quan Judge, Irish occultist and theosophist (d. 1896) |
| 42464 | April 13 | Birth | 1852 – Frank Winfield Woolworth, American businessman, founded the F.W. Woolworth Company (d. 1919) |
| 42465 | April 13 | Birth | 1860 – James Ensor, Belgian painter (d. 1949) |
| 42466 | April 13 | Birth | 1866 – Butch Cassidy, American criminal (d. 1908) |
| 42467 | April 13 | Birth | 1872 – John Cameron, Scottish footballer and manager (d. 1935) |
| 42468 | April 13 | Birth | 1872 – Alexander Roda Roda, Austrian-Croatian journalist and author (d. 1945) |
| 42469 | April 13 | Birth | 1873 – John W. Davis, American lawyer and politician, 14th United States Solicitor General (d. 1955) |
| 42470 | April 13 | Birth | 1875 – Ray Lyman Wilbur, American physician, academic, and politician, 31st United States Secretary of the Interior (d. 1949) |
| 42471 | April 13 | Birth | 1879 – Edward Bruce, American lawyer and painter (d. 1943) |
| 42472 | April 13 | Birth | 1880 – Charles Christie, Canadian-American businessman, co-founded the Christie Film Company (d. 1955) |
| 42473 | April 13 | Birth | 1885 – Vean Gregg, American baseball player (d. 1964) |
| 42474 | April 13 | Birth | 1885 – Juhan Kukk, Estonian politician, Head of State of Estonia (d. 1942) |
| 42475 | April 13 | Birth | 1885 – György Lukács, Hungarian philosopher and critic (d. 1971) |
| 42476 | April 13 | Birth | 1887 – Gordon S. Fahrni, Canadian physician and golfer (d. 1995) |
| 42477 | April 13 | Birth | 1887 – Peter Ratican, American soccer player (d. 1922) |
| 42478 | April 13 | Birth | 1889 – Herbert Yardley, American cryptologist and author (d. 1958) |
| 42479 | April 13 | Birth | 1890 – Frank Murphy, American jurist and politician, 56th United States Attorney General (d. 1949) |
| 42480 | April 13 | Birth | 1890 – Dadasaheb Torne, Indian director and producer (d. 1960) |