Surname Tvardovskii (Tvardovskii 
, Твардовский 
) , in all the world, is a rare family name. The family name Tvardovskii is habitual in Belarus, where it is a rare surname, Russia, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Tvardovskii | Russia, Ukraine, Belarus |
| Твардовский | Kazakhstan, Russia, Ukraine, Belarus |