| 122971 | October 27 | Birth | 1992 – Junya Ikeda, Japanese actor |
| 122972 | October 27 | Birth | 1992 – Taiko Katono, Japanese model and actor |
| 122973 | October 27 | Birth | 1992 – Brandon Saad, American ice hockey player |
| 122974 | October 27 | Birth | 1993 – Kiefer Ravena, Filipino basketball player |
| 122975 | October 27 | Birth | 1994 – Eddie Alderson, American actor |
| 122976 | October 27 | Birth | 1999 – Haruka Kudo, Japanese singer and actress (Morning Musume) |
| 122977 | October 27 | Death | 939 – Æthelstan, English king (b. 894) |
| 122978 | October 27 | Death | 1312 – John II, Duke of Brabant (b. 1275) |
| 122979 | October 27 | Death | 1327 – Elizabeth de Burgh, Scottish wife of Robert I of Scotland (b. 1289) |
| 122980 | October 27 | Death | 1430 – Vytautas, Lithuanian ruler (b. 1350) |
| 122981 | October 27 | Death | 1439 – Albert II of Germany (b. 1397) |
| 122982 | October 27 | Death | 1449 – Ulugh Beg, Persian astronomer, mathematician, and sultan (b. 1394) |
| 122983 | October 27 | Death | 1485 – Rodolphus Agricola, Dutch philosopher, poet, and educator (b. 1443) |
| 122984 | October 27 | Death | 1505 – Ivan III of Russia (b. 1440) |
| 122985 | October 27 | Death | 1553 – Michael Servetus, Spanish physician and theologian (b. 1511) |
| 122986 | October 27 | Death | 1561 – Lope de Aguirre, Spanish explorer (b. 1510) |
| 122987 | October 27 | Death | 1573 – Laurentius Petri, Swedish archbishop (b. 1499) |
| 122988 | October 27 | Death | 1605 – Akbar, Mughal emperor (b. 1542) |
| 122989 | October 27 | Death | 1617 – Ralph Winwood, English lawyer and politician, English Secretary of State (b. 1563) |
| 122990 | October 27 | Death | 1666 – Robert Hubert, French watchmaker (b. 1640) |
| 122991 | October 27 | Death | 1670 – Vavasor Powell, Welsh minister (b. 1617) |
| 122992 | October 27 | Death | 1674 – Hallgrímur Pétursson, Icelandic minister and poet (b. 1614) |
| 122993 | October 27 | Death | 1675 – Gilles de Roberval, French mathematician and academic (b. 1602) |
| 122994 | October 27 | Death | 1789 – John Cook, American farmer and politician, 6th Governor of Delaware (b. 1730) |
| 122995 | October 27 | Death | 1816 – Santō Kyōden, Japanese poet and painter (b. 1761) |
| 122996 | October 27 | Death | 1880 – Thrasyvoulos Zaimis, Greek soldier and politician, 48th Prime Minister of Greece (b. 1822) |
| 122997 | October 27 | Death | 1917 – Arthur Rhys-Davids, English lieutenant and pilot (b. 1897) |
| 122998 | October 27 | Death | 1926 – Warren Wood, American golfer and soldier (b. 1887) |
| 122999 | October 27 | Death | 1927 – Squizzy Taylor, Australian gangster (b. 1888) |
| 123000 | October 27 | Death | 1930 – Ellen Hayes, American mathematician and astronomer (b. 1851) |