| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Yakov | YAH-kahf (Russian) | Hebrew, Russian, Bulgarian | ||
| Yana | - | Bulgarian, Russian, Ukrainian | ||
| Yanka | - | Bulgarian | ||
| Yanko | - | Bulgarian | ||
| Yasen | - | Bulgarian | ||
| Yavor | - | Bulgarian | ||
| Yoan | - | Bulgarian | ||
| Yoana | - | Bulgarian | ||
| Yordan | - | Bulgarian | ||
| Yordana | - | Bulgarian | ||
| Yordanka | - | Bulgarian | ||
| Yosif | - | Bulgarian | ||
| Yulian | - | Russian, Bulgarian | ||
| Yuliana | - | Russian, Bulgarian, Indonesian | ||
| Yuliya | YOO-lee-yah (Russian) | Russian, Ukrainian, Bulgarian |