| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| XENON | - | Ancient Greek | ||
| XENOPHON | - | Ancient Greek | ||
| XERXES | ZURK-seez (English) | History | ||
| XESÚS | - | Galician | ||
| XIMENO | - | Medieval Spanish | ||
| XIMO | - | Catalan, Spanish | ||
| XIMUN | - | Basque | ||
| XOÁN | - | Galician | ||
| XOCHIPILLI | - | Aztec and Toltec Mythology | ||
| XOEL | - | Galician | ||
| XOLANI | - | Southern African, Zulu | ||
| XOSÉ | - | Galician | ||
| XUAN | - | Spanish | ||
| XURXO | SHOOR-shaw | Galician | ||
| XYSTOS | - | Late Greek |