Quick answer
Octavius is a boy name meaning "eighth".
Pronunciation: Latin /ok.ˈtaː.wi.us/; American English /ɑk.ˈteɪ.vi.əs/; British English /ɒk.ˈteɪ.vi.əs/.
Meaning and history
Roman family name derived from Latin octavus meaning "eighth". This was the original family name of the emperor Augustus (born Gaius Octavius). It was also rarely used as a Roman praenomen, or given name.
Notes and context
Usage: ancient roman