Surname Bajarūnas (Bajarūnas 
, Баярунас 
) , across the world, is a very rare family name. The last name Bajarūnas is habitual in Lithuania, where it is a rare surname, and Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Bajarūnas | Lithuania |
| Баярунас | Russia |
| mykolas bajarūnas (b. 1882) |
|