Cognomen Воислав (Vojislav 
, Voislav 
, Воислав 
) , throughout the world, is quite a rare family name. The surname Воислав is habitual in North Macedonia, where it is quite a common surname, Serbia, where it is quite a rare surname, and Romania, where it is a rare surname. More prevalently, Воислав is the forename as well as the last name.