| Xander | | KSAHN-dər (Dutch), ZAN-dər (English) | Dutch, English (Modern) | |
| Xanthe | | - | Greek Mythology, Ancient Greek | |
| Xanthia | | - | English (Rare) | |
| Xanthippe | | ksahn-teep-pe (Ancient Greek), zan-TIP-ee (English) | Ancient Greek | |
| Xanthippos | | - | Ancient Greek | |
| Xanthos | | - | Greek Mythology, Ancient Greek | |
| Xavia | | - | English (Rare) | |
| Xavier | | ZAY-vee-ər (English), ZAY-vyər (English), ig-ZAY-vee-ər (English), za-VYE (French), sha-VYER (Portuguese) | English, French, Portuguese, Catalan, Spanish (Archaic) | |
| Xaviera | | - | English (Rare) | |
| Xavior | | - | English (Rare) | |
| Xenia | | - | Greek, Ancient Greek | |
| Xeno | | - | Ancient Greek | |
| Xenocrates | | zi-NAH-krə-teez (English) | Ancient Greek (Latinized) | |
| Xenokrates | | - | Ancient Greek | |
| Xenon | | - | Ancient Greek | |