| 31741 | March 21 | Death | 1063 – Richeza of Lotharingia (b. 995) |
| 31742 | March 21 | Death | 1076 – Robert I, Duke of Burgundy (b. 1011) |
| 31743 | March 21 | Death | 1306 – Robert II, Duke of Burgundy (b. 1248) |
| 31744 | March 21 | Death | 1487 – Nicholas of Flüe, Swiss monk and saint (b. 1417) |
| 31745 | March 21 | Death | 1540 – John de Vere, 15th Earl of Oxford, English peer and courtier (b. c. 1482) |
| 31746 | March 21 | Death | 1556 – Thomas Cranmer, English archbishop and saint (b. 1489) |
| 31747 | March 21 | Death | 1653 – Tarhoncu Ahmed Pasha, Albanian politician, Grand Vizier of the Ottoman Empire |
| 31748 | March 21 | Death | 1656 – James Ussher, Irish archbishop (b. 1581) |
| 31749 | March 21 | Death | 1676 – Henri Sauval, French historian and author (b. 1623) |
| 31750 | March 21 | Death | 1729 – John Law, Scottish-French economist and politician, Controller-General of Finances (b. 1671) |
| 31751 | March 21 | Death | 1734 – Robert Wodrow, Scottish historian and author (b. 1679) |
| 31752 | March 21 | Death | 1751 – Johann Heinrich Zedler, German publisher (b. 1706) |
| 31753 | March 21 | Death | 1762 – Nicolas Louis de Lacaille, French priest, astronomer, and academic (b. 1713) |
| 31754 | March 21 | Death | 1772 – Jacques-Nicolas Bellin, French geographer and cartographer (b. 1703) |
| 31755 | March 21 | Death | 1795 – Giovanni Arduino, Italian miner and geologist (b. 1714) |
| 31756 | March 21 | Death | 1801 – Andrea Luchesi, Italian composer and educator (b. 1741) |
| 31757 | March 21 | Death | 1804 – Louis Antoine, Duke of Enghien (b. 1772) |
| 31758 | March 21 | Death | 1843 – Robert Southey, English poet, historian, and translator (b. 1774) |
| 31759 | March 21 | Death | 1843 – Guadalupe Victoria, Mexican general and politician, 1st President of Mexico (b. 1786) |
| 31760 | March 21 | Death | 1863 – Edwin Vose Sumner, American general (b. 1797) |
| 31761 | March 21 | Death | 1884 – Ezra Abbot, American scholar and academic (b. 1819) |
| 31762 | March 21 | Death | 1896 – William Quan Judge, Irish occultist and theosophist (b. 1851) |
| 31763 | March 21 | Death | 1915 – Frederick Winslow Taylor, American golfer, tennis player, and engineer (b. 1856) |
| 31764 | March 21 | Death | 1920 – Evelina Haverfield Scottish nurse and activist (b. 1867) |
| 31765 | March 21 | Death | 1932 – Frantz Reichel, French rugby player and hurdler (b. 1871) |
| 31766 | March 21 | Death | 1934 – Franz Schreker, Austrian composer and conductor (b. 1878) |
| 31767 | March 21 | Death | 1936 – Alexander Glazunov, Russian composer and conductor (b. 1865) |
| 31768 | March 21 | Death | 1939 – Evald Aav, Estonian composer and conductor (b. 1900) |
| 31769 | March 21 | Death | 1939 – Ali Hikmet Ayerdem, Turkish general and politician (b. 1877) |
| 31770 | March 21 | Death | 1943 – Cornelia Fort, American soldier and pilot (b. 1919) |