Family name Свйатослав (Sviatoslav 
, Svjatoslav 
, Свйатослав ) , all around the world, is a rare cognomen. The surname Свйатослав is characteristic of Western Asia, particularly Azerbaijan, where it is quite a rare surname, Israel, where it is a rare surname, and Georgia. Measured by absolute frequency, it is the most numerous in Azerbaijan, Israel, and Greece. More prevalently, Свйатослав is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sviatoslav | Russia, Ukraine, Cyprus, United States, Israel |
| Svjatoslav | Azerbaijan, Belarus, Ukraine, Russia, United States |
| Свйатослав | Russia |