Cognomen Septimiu (Septimiu 
) , in the world, is a rare family name. The family name Septimiu is habitual in Romania, where it is quite a rare surname, and Spain, where it is an extremely rare surname. More frequently, Septimiu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Septimiu | Canada, Spain, United States, Romania, Germany |