| X, Malcolm | (1925 - 1965) | 11 | Zitate |
| X., Pius | (1835 - 1914) | 2 | Zitate |
| Xenokrates | (395 - 314 v. Chr.) | 1 | Zitat |
| Xenophanes | (570 - 470) | 2 | Zitate |
| Xenophon | (426 - 355 v. Chr.) | 2 | Zitate |
| Xerox | 1 | Zitat | |
| Xerxes I. | (519 - 465 v. Chr.) | 1 | Zitat |
| Xiaoping, Deng | (1904 - 1997) | 5 | Zitate |
| XII, Ludwig | (1462 - 1515) | 1 | Zitat |
| Xingjian, Gao | (*1940) | 2 | Zitate |
| XIV., Ludwig | (1638 - 1715) | 10 | Zitate |
| Xu Zhimo | (1897 - 1931) | 1 | Zitat |
| XVI., Benedikt | (*1927) | 4 | Zitate |
| XVI., Ludwig | (1754 - 1793) | 1 | Zitat |