Family name Ostankovich (Ostankovich 
, Останкович 
) , in all the world, is a rare last name. The surname Ostankovich is characteristic of Russia, where it is a very rare surname, Ukraine, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ostankovich | Russia, United States |
| Останкович | Russia, Ukraine |