| 37561 | April 1 | Death | 1897 – Jandamarra, Australian activist (b. 1873) |
| 37562 | April 1 | Death | 1914 – Rube Waddell, American baseball player (b. 1876) |
| 37563 | April 1 | Death | 1914 – Charles Wells, English founder of Charles Wells Ltd (b. 1842) |
| 37564 | April 1 | Death | 1915 – Theodor Altermann, Estonian actor and director (b. 1885) |
| 37565 | April 1 | Death | 1917 – Scott Joplin, American pianist and composer (b. 1868) |
| 37566 | April 1 | Death | 1920 – Walter Simon, German banker and philanthropist (b. 1857) |
| 37567 | April 1 | Death | 1922 – Charles I of Austria (b. 1887) |
| 37568 | April 1 | Death | 1922 – Hermann Rorschach, Swiss psychologist and author (b. 1884) |
| 37569 | April 1 | Death | 1924 – Jacob Bolotin, American physician (b. 1888) |
| 37570 | April 1 | Death | 1924 – Lloyd Hildebrand, English cyclist (b. 1870) |
| 37571 | April 1 | Death | 1924 – Stan Rowley, Australian sprinter (b. 1876) |
| 37572 | April 1 | Death | 1925 – Lars Jørgen Madsen, Danish target shooter (b. 1871) |
| 37573 | April 1 | Death | 1930 – Cosima Wagner, Hungarian wife of Richard Wagner (b. 1837) |
| 37574 | April 1 | Death | 1946 – Noah Beery, Sr., American actor and singer (b. 1882) |
| 37575 | April 1 | Death | 1947 – George II of Greece (b. 1890) |
| 37576 | April 1 | Death | 1950 – Charles R. Drew, American physician and surgeon (b. 1904) |
| 37577 | April 1 | Death | 1950 – Recep Peker, Turkish soldier and politician, 6th Prime Minister of Turkey (b. 1889) |
| 37578 | April 1 | Death | 1962 – Jussi Kekkonen, Finnish captain and businessman (b. 1910) |
| 37579 | April 1 | Death | 1965 – Helena Rubinstein, Polish-American businesswoman (b. 1870) |
| 37580 | April 1 | Death | 1966 – Brian O'Nolan, Irish author and playwright (b. 1911) |
| 37581 | April 1 | Death | 1967 – Đặng Văn Ngữ, Vietnamese physician (b. 1910) |
| 37582 | April 1 | Death | 1968 – Lev Landau, Azerbaijani-Russian physicist and academic, Nobel Prize laureate (b. 1908) |
| 37583 | April 1 | Death | 1976 – Max Ernst, German painter and sculptor (b. 1891) |
| 37584 | April 1 | Death | 1979 – Bruno Coquatrix, French talent manager (b. 1910) |
| 37585 | April 1 | Death | 1979 – Barbara Luddy, American actress and singer (b. 1908) |
| 37586 | April 1 | Death | 1981 – Eua Sunthornsanan, Thai singer-songwriter and bandleader (b. 1910) |
| 37587 | April 1 | Death | 1984 – Marvin Gaye, American singer-songwriter (The Moonglows) (b. 1939) |
| 37588 | April 1 | Death | 1984 – Elizabeth Goudge, English author (b. 1900) |
| 37589 | April 1 | Death | 1985 – Douglass Wallop, American author and playwright (b. 1920) |
| 37590 | April 1 | Death | 1986 – Erik Bruhn, Danish actor, director, and choreographer (b. 1928) |