| 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 | |
| Pavlo | | - | Ukrainian | |
| Petro | | PE-tro (Esperanto) | Ukrainian, Esperanto | |
| Polina | | pah-LEE-nah (Russian) | Russian, Ukrainian, Bulgarian | |
| Pylyp | | - | Ukrainian | |
| Roman | | rah-MAHN (Russian), RAW-mahn (Polish) | Russian, Polish, Czech, Slovak, Ukrainian, Slovene, Croatian, German | |
| Ruslan | | roo-SLAHN (Russian) | Russian, Tatar, Bashkir, Ukrainian, Belarusian, Kazakh, Kyrgyz, Uzbek, Azerbaijani, Ossetian, Cheche | |
| Ruslana | | - | Ukrainian | |