Cognomen Plakhtii (Plakhtii 
, Плахтии , Плахтий 
) , in the world, is a rare last name. The surname Plakhtii is habitual in Russia, where it is a rare surname, Kazakhstan, and Belarus. Measured by absolute frequency, it is commonest in Russia, Kazakhstan, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Plakhtii | Kazakhstan, Russia, Estonia, United States |
| Плахтии | Russia |
| Плахтий | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |