| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| OCTAVIO | ok-TAH-vyo | Spanish | ||
| OCTAVIUS | ahk-TAYV-ee-əs (English) | Ancient Roman | ||
| ODALRIC | - | Ancient Germanic | ||
| ODD | - | Norwegian | ||
| ODDMUND | - | Norwegian | ||
| ODDO | - | Italian | ||
| ODDR | - | Ancient Scandinavian | ||
| ODE | - | Medieval English | ||
| ODED | - | Biblical | ||
| Odell | [əu'del] | |||
| ODEN | - | Norse Mythology | ||
| ODHIAMBO | - | Eastern African, Luo | ||
| ODHRÁN | O-rawn | Irish | ||
| ODILO | - | Ancient Germanic | ||
| ODILON | - | French, Portuguese |