Surname Ostur (Ostur 
, Ostr 
) , in all the world, is a very rare cognomen. The family name Ostur is characteristic of Poland, where it is a rare surname, France, where it is an extremely rare surname, and Turkey. Measured by absolute frequency, it most frequently occurs in Poland, India, and France. Likewise, Ostur is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ostur | India, Turkey |
| Ostr | Ukraine, France, Poland, United States, Russia |