Surname Октавий (Octavius 
, Octavi 
, Октавий 
) , across the world, is quite a rare family name. The cognomen Октавий is characteristic of Haiti, where it is quite a rare surname, Spain, where it is a rare surname, and the Dominican Republic. In absolute terms, this name is the most popular in Indonesia, Spain, and Haiti. Also, Октавий is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Octavius | Indonesia, Philippines, United States, Tanzania, Haiti |
| Octavi | Indonesia, Spain, Mexico, Honduras, United States |
| Октавий | Kazakhstan, Russia, Belarus |