Surname Świętojańska (Świętojańska 
) , in the entire world, is a very rare last name. The surname Świętojańska is habitual in Eastern Europe, particularly Poland, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Świętojańska | Poland |
| jolanta świętojańska Polish entomologist, PL |
|