| 138091 | December 6 | Death | 1779 – Jean-Baptiste-Siméon Chardin, French painter (b. 1699) |
| 138092 | December 6 | Death | 1788 – Jonathan Shipley, English bishop (b. 1714) |
| 138093 | December 6 | Death | 1855 – William John Swainson, English ornithologist and entomologist (b. 1789) |
| 138094 | December 6 | Death | 1867 – Jean Pierre Flourens, French physiologist and academic (b. 1794) |
| 138095 | December 6 | Death | 1868 – August Schleicher, German linguist and academic (b. 1821) |
| 138096 | December 6 | Death | 1878 – Theodoros Vryzakis, Greek painter (b. 1814) |
| 138097 | December 6 | Death | 1879 – Erastus Brigham Bigelow, American inventor (b. 1814) |
| 138098 | December 6 | Death | 1882 – Alfred Escher, Swiss businessman and politician, founded Credit Suisse (b. 1819) |
| 138099 | December 6 | Death | 1882 – Anthony Trollope, English author (b. 1815) |
| 138100 | December 6 | Death | 1889 – Jefferson Davis, American general and politician, President of the Confederate States of America (b. 1808) |
| 138101 | December 6 | Death | 1892 – Werner von Siemens, German businessman, founded the Siemens Company (b. 1816) |
| 138102 | December 6 | Death | 1913 – Alec Hurley, English music hall singer (b. 1871) |
| 138103 | December 6 | Death | 1920 – Rosalia Lombardo, Italian pneumonia victim (b. 1918) |
| 138104 | December 6 | Death | 1921 – Jesse Carleton, American golfer (b. 1862) |
| 138105 | December 6 | Death | 1924 – Gene Stratton-Porter, American author and screenwriter (b. 1863) |
| 138106 | December 6 | Death | 1934 – Charles Michael, Duke of Mecklenburg (b. 1863) |
| 138107 | December 6 | Death | 1949 – Lead Belly, American singer-songwriter and guitarist (b. 1888) |
| 138108 | December 6 | Death | 1951 – Harold Ross, American journalist and publisher, founded The New Yorker (b. 1892) |
| 138109 | December 6 | Death | 1955 – Honus Wagner, American baseball player and manager (b. 1874) |
| 138110 | December 6 | Death | 1956 – B. R. Ambedkar, Indian economist and politician, 1st Indian Minister of Justice (b. 1891) |
| 138111 | December 6 | Death | 1956 – John Geiger, American rower (b. 1873) |
| 138112 | December 6 | Death | 1961 – Frantz Fanon, Martinique-French psychiatrist and author (b. 1925) |
| 138113 | December 6 | Death | 1964 – Evert van Linge, Dutch footballer and architect (b. 1895) |
| 138114 | December 6 | Death | 1964 – Consuelo Vanderbilt, American wife of Charles Spencer-Churchill, 9th Duke of Marlborough (b. 1877) |
| 138115 | December 6 | Death | 1972 – Janet Munro, English actress and singer (b. 1934) |
| 138116 | December 6 | Death | 1976 – João Goulart, Brazilian lawyer and politician, 24th President of Brazil (b. 1918) |
| 138117 | December 6 | Death | 1980 – Charles Deutsch, French aerodynamics engineer and automobile maker, co-founder of the brand "DB (b. 1911) |
| 138118 | December 6 | Death | 1982 – K. Kailasapathy, Sri Lankan journalist and academic (b. 1933) |
| 138119 | December 6 | Death | 1982 – Jean-Marie Seroney, Kenyan politician (b. 1927) |
| 138120 | December 6 | Death | 1983 – Lucienne Boyer, French singer and actress (b. 1903) |