| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Yosif | - | Bulgarian | ||
| Yulian | - | Russian, Bulgarian | ||
| Yuliana | - | Russian, Bulgarian, Indonesian | ||
| Yuliya | YOO-lee-yah (Russian) | Russian, Ukrainian, Bulgarian | ||
| Zahari | - | Bulgarian | ||
| Zaharina | - | Bulgarian, Macedonian | ||
| Zaharinka | - | Bulgarian, Macedonian | ||
| Zara (2) | - | Bulgarian | ||
| Zdravko | - | Croatian, Serbian, Slovene, Bulgarian, Macedonian | ||
| Zhaklina | - | Macedonian, Bulgarian | ||
| Zhelyazko | - | Bulgarian | ||
| Zhenya | - | Russian, Bulgarian | ||
| Zhivka | - | Bulgarian, Macedonian | ||
| Zhivko | - | Bulgarian, Macedonian | ||
| Zlatan | - | Croatian, Serbian, Bosnian, Macedonian, Bulgarian, Slovene |