Ancient Roman name meaning "eighth," famously borne by the first Roman emperor Augustus.
Octavian descends from the Latin Octavianus, a derivative of Octavius, itself rooted in octavus — 'eighth.' In ancient Rome, such numerical names often indicated birth order, and Octavius was a respected plebeian gens (clan) name. The name would have remained a dignified footnote in Roman nomenclature had not one extraordinary individual transformed it into something far larger: Gaius Octavius Thurinus, great-nephew and adopted heir of Julius Caesar, who became Augustus Caesar — the first Roman Emperor — and ruled from 27 BCE to 14 CE.
His 41-year reign inaugurated the Pax Romana and reshaped the ancient world. After his adoption by Caesar he was called Octavian by historians to distinguish him from his adoptive father; after his senate-granted title he became Augustus, but Octavian remains the name by which history knows his youth. The name never fully disappeared from use in the Romance-language world, particularly in Romania, where Octavian has remained a genuine given name for centuries — borne by the poet and politician Octavian Goga (1881–1938) and others.
In English-speaking countries it stayed largely literary and historical, appearing in fiction when authors needed a character with Roman gravity. In the 21st century, Octavian has entered a renaissance, driven partly by the popularity of lengthy, classical names and partly by Leigh Bardugo's Grishaverse novels. Its nicknames — Otto, Tavi, Octave — give it practical range. It signals a parent unafraid of history's weight.