| Author | Profession | Birth date | Death date |
|---|---|---|---|
| X. J. Kennedy | American Author | August 21, 1929 | |
| Xabi Alonso | Footballer | November 25, 1981 | |
| Xanana Gusmao | Former President of East Timor | June 20, 1946 | |
| Xander Berkeley | American Actor | December 6, 1958 | |
| Xavi | Spanish Athlete | January 25, 1980 | |
| Xavier Atencio | Animator | September 4, 1919 | |
| Xavier Becerra | American Politician | January 26, 1958 | |
| Xavier Cugat | Bandleader | January 1, 1900 | October 27, 1990 |
| Xavier de Maistre | Writer | October 10, 1763 | June 12, 1852 |
| Xavier Dolan | Canadian Actor | March 20, 1989 | |
| Xavier Durringer | December 1, 1963 | ||
| Xavier Forneret | Writer | August 16, 1809 | August 7, 1884 |
| Xavier Gens | Film director | April 27, 1975 | |
| Xavier Niel | French Businessman | August 25, 1967 | |
| Xavier Rudd | Australian Musician | 1978 | |
| Xavier Samuel | Australian Actor | December 10, 1983 | |
| Xaviera Hollander | Call girl | June 15, 1943 | |
| Xaviera Simmons | 1974 | ||
| Xeno Muller | Olympic athlete | August 7, 1972 | |
| Xenobia Bailey | 1955 | ||
| Xenocrates | Philosopher | 396 BC | 314 BC |
| Xenophanes | Greek Philosopher | 570 BC | 480 BC |
| Xenophon | Greek Soldier | 430 BC | 357 BC |
| Xerxes I | King | 519 BC | 465 BC |
| Xi Jinping | Chinese Politician | June 15, 1953 | |
| Xiang Yu | 232 BC | 202 BC | |
| Xiaolu Guo | Novelist | 1973 | |
| Ximenes Doudan | Journalist | 1800 | 1872 |
| Xinran | Journalist | 1958 | |
| Xochi Birch | American Businesswoman | ||
| Xosha Roquemore | American Actress | December 11, 1984 | |
| Xu Zhimo | Poet | January 15, 1897 | November 19, 1931 |
| Xu Zhiyong | Lawyer | March 2, 1973 | |
| Xuanzang | Scholar | 602 | February 5, 664 |
| Xun Kuang | Chinese Philosopher | 310 BC | 237 BC |
| Xunzi | Philosopher | ||
| Xzibit | Rapper | September 18, 1974 |