| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Xeno | - | Ancient Greek | ||
| Xenocrates | zi-NAH-krə-teez (English) | Ancient Greek (Latinized) | ||
| Xenokrates | - | Ancient Greek | ||
| Xenon | - | Ancient Greek | ||
| Xenophon | - | Ancient Greek | ||
| Xystos | - | Late Greek | ||
| Yanna | - | Greek | ||
| Yanni | - | Greek | ||
| Yannis | - | Greek | ||
| Yianni | - | Greek | ||
| Yiannis | - | Greek | ||
| Yiorgos | - | Greek | ||
| Yorgos | - | Greek | ||
| Zaboulon | - | Biblical Greek | ||
| Zacharias | zak-ə-RIE-əs (English) | Biblical, Biblical Greek |