| Author | Titles | | 1.
| Xenakis, Mâkhi, 1956- | 5 | | 2.
| Xenofonte, ca 430-354 a.C. | 9 | | 3.
| Xenophôn, ca 430-354 a.C | 0 | | 4.
| Author is: Xenofonte, ca 430-354 a.C. | 9 | | 5.
| Xénophon, ca 430-354 a.C | 0 | | 6.
| Author is: Xenofonte, ca 430-354 a.C. | 9 | | 7.
| Xénopol, Alejandro Demetrio, 1847-1920 | 3 | | 8.
| Xexéo, Monica F. Braunschweiger | 1 | | 9.
| Xexéo, Pedro | 1 | | 10.
| Xhafa, Sislej, 1970- | 1 | | 11.
| Xhardez, R. | 1 | | 12.
| Xhingyu Chen | 2 |
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