Cognomen Octavianus (Octavian 
, Octavianus 
, Октавиан 
) , across the world, is a common family name. The surname Octavianus is characteristic of Romania, where it is quite a common surname, Moldova, and Indonesia, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Indonesia, Romania, and Tanzania. Also, Octavianus is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Octavian | Indonesia, Romania, Moldova, United States, Tanzania |
| Octavianus | Indonesia, Italy, United States, Tanzania, Canada |
| Октавиан | Kazakhstan, Romania, Russia, Belarus, Ukraine |
| Рясянен | Russia, Ukraine |
César Augusto, and Octaviano
| petrus octavianus founder of the Indonesian Evangelical Association, ID (b. 1928) |
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| p. octavianus (b. 1926) |
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| grace rosaline octavianus Indonesian politician (born 1962 in Malang), ID (b. 1962) |
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| jack johanis octavianus ID (b. 1958) |
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| steven octavianus researcher |
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| lucius flavius septimius aper octavianus nephew of emperor Septimius Severus |
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| lucius plautius octavianus great-grandfather of the Roman emperor Septimius Severus |
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| oei fuad octavianus |
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