| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Xanthippos | - | Ancient Greek | ||
| Xanthos | - | Greek Mythology, Ancient Greek | ||
| Xenia | - | Greek, Ancient Greek | ||
| Xeno | - | Ancient Greek | ||
| Xenocrates | zi-NAH-krə-teez (English) | Ancient Greek (Latinized) | ||
| Xenokrates | - | Ancient Greek | ||
| Xenon | - | Ancient Greek | ||
| Xenophon | - | Ancient Greek | ||
| Yeshua | - | Biblical Hebrew, Ancient Aramaic | ||
| Yngvarr | - | Ancient Scandinavian | ||
| Yngvildr | - | Ancient Scandinavian | ||
| Zarathushtra | - | Ancient Persian | ||
| Zenais | - | Ancient Greek | ||
| Zeno | - | Ancient Greek (Latinized), Italian | ||
| Zenobia | zə-NO-bee-ə (English) | Ancient Greek |