Octavia, derived from the Latin 'octavius' meaning eighth, was quite popular during the Roman Empire era. It is believed to have been borne by several notable women, most famously Octavia Minor, the sister of Augustus Caesar who herself had a significant influence on Roman politics and society.
Octavia was a popular name in the late 20th century, with a notable spike in its popularity between 1990 and 1993, during which time over half of all Octavias were born.