Throughout the world, Октав (Octave 
, Octav 
, Oktav 
) is quite a common predominantly masculine, but very infrequently girly first name. The first name Октав is characteristic of the Democratic Republic of the Congo, where it is quite a rare mostly masculine, but seldom feminine name, Romania, where it is quite a rare masculine name, and the Republic of the Congo. In absolute terms, the name is most common in the Democratic Republic of the Congo, France, and Ethiopia. Also, Октав is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Octave | France, Rwanda, Indonesia, Democratic Republic of the Congo, Ethiopia |
| Octav | Romania, Canada, France, United States, Indonesia |
| Oktav | Germany, Sweden, United States, Indonesia, Turkey |
| Октав | Russia, Ukraine |
Октав is also a name for the fictitious and mythical characters: Octave de Camps , the Honoré de Balzac character, La Comédie humaine; Octave de Bauvan , the Honoré de Balzac character, La Comédie humaine; Octave Flaubert , the operatic character in the operetta Eva; Octave de Beaulieu , the theatrical character in the play "The Ironmaster" and Octave , the operatic character in the opera Cléopâtre by Jules Massenet.