Surname Kostrub (Коструб 
, Kostrub 
) , across the world, is quite a rare family name. The surname Kostrub is habitual in Ukraine, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Israel. Measured by absolute frequency, the name is most common in Ukraine, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Коструб | Kazakhstan, Ukraine, Belarus, Russia |
| Kostrub | Russia, Finland, United States, Canada, Israel |
| irina dmitrievna kostrub Ph.D. Voronezh State University 2011 |
|
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