Surname Kupava (Kupava 
) , across the world, is a very rare last name. The family name Kupava is habitual in Estonia, where it is a rare surname, Belarus, and Russia, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Belarus, Estonia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Kupava | Belarus, Ukraine, Estonia, Russia, United States |