From Latin 'octavus' meaning eighth, traditionally given to the eighth child in a family.
Octave is the French form of the Latin Octavius or Octavianus, derived from octavus, meaning "eighth" — likely originally given to an eighth child or eighth-born son in a large Roman family. The name's greatest historical bearer adopted it in reverse: Gaius Octavius took the title Augustus after becoming Rome's first emperor, and the month of August is named partly in his honor. The ordinal simplicity of the name belies its imperial pedigree, and in France the form Octave carried aristocratic weight well through the nineteenth century.
In French cultural history, Octave appears in literature with memorable force. Stendhal named the brooding protagonist of Armance (1827) Octave de Malivert, giving the name a Romantic-era association with intense, melancholic sensitivity. Octave Mirbeau (1848–1917), the provocateur novelist and playwright behind The Diary of a Chambermaid, added a sharp satirical edge to the name's profile.
Meanwhile, in aviation history, Octave Chanute (1832–1910) — the French-born American engineer whose glider experiments directly inspired the Wright Brothers — gave the name a heroic, forward-looking dimension that crosses continents and centuries. In music, the word "octave" (derived from the same Latin root) means the interval of eight notes, an echo that gives the name an almost built-in musical resonance. Today Octave is rare in English-speaking countries but maintains quiet use in Belgium and France, where it reads as a distinguished, slightly old-fashioned given name with impeccable classical roots. For parents drawn to names that are genuinely uncommon yet carry real historical and cultural weight, Octave offers both.