| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Odarka | - | Ukrainian | ||
| Oksana | ahk-SAH-nah (Russian) | Ukrainian, Russian | ||
| Oleksander | - | Ukrainian | ||
| Oleksandr | - | Ukrainian | ||
| Oleksandra | - | Ukrainian | ||
| Oleksiy | - | Ukrainian | ||
| Olena | - | Ukrainian | ||
| Oles | - | Ukrainian | ||
| Olexiy | - | Ukrainian | ||
| Olga | OL-gah (Russian), AWL-gah (Polish, German) | Russian, Ukrainian, Polish, German, Swedish, Norwegian, Danish, Icelandic, Latvian, Hungarian, Itali | ||
| Olha | - | Ukrainian | ||
| Oxana | - | Ukrainian, Russian |