Octavia \o-cta-via, oc-tavia\ as a girl's name is pronounced ock-TAHV-yah, ock-TAY-vee-ah. It is of Latin origin, and the meaning of Octavia is "eighth". Feminine form of Octavius. A clan name of Roman emperors used often in Victorian times.

Octavia has 9 variant forms: Octaviana, Octavianne, Octavie, Octiana, Octoviana, Ottavia, Tavia, Tavie and Tavy.

For more information, see also the related name Tertia.