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 | Estonia, Russia, United States, Kazakhstan |
| Плахтии | Russia |
| Плахтий | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |