Cognomen Svetoslav (Svetoslav 
, Светослав 
, סבטוסלב 
) , all over the world, is quite a rare last name. The surname Svetoslav is habitual in Bulgaria, where it is quite a rare surname, North Macedonia, and Spain, where it is a rare surname. More prevalently, Svetoslav is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Svetoslav | Greece, Spain, Bulgaria, United States, Romania |
| Светослав | Kazakhstan, Ukraine, Belarus, Bulgaria, Russia |
| סבטוסלב | Israel |
Sveto, Sviataslau, Sviatoslav, Svjatoslav, Svyatoslav, Svétoslav, Swetoslaw, Swjatoslaw, Światosław, Свето, Святаслав, Святаслаў, Святослав, and Свётослав
Mitev, Lazarov, Todorov, Nikolov, Hristov, Vasilev, Mihaylov, Mladenov, Simeonov, Stefanov, Stanchev, Stoyanov, Slavchev, Aleksiev, Atanasov, Dimitrov, Georgiev, Grigorov, Yordanov, Kostadinov, Vladimirov, Svetoslavov, Krastev, Kirilov, Borisov, Angelov, Savov, Kolev, Popov, Dimov, Nikov, Iliev, Markov, Stoqnov, Spasov, Slavov, Aleksandrov, Asenov, Pavlov, Petrov, Petkov, Dobrev, Ivanov, Marinov, Milanov, Sokolov, Stoilov, Stoykov, Kostov, and Nikolaychov