Cognomen Tvardauskas (Tvardauskas 
) , across the world, is a very rare last name. The cognomen Tvardauskas is characteristic of Lithuania, where it is quite a rare surname, the United Kingdom, where it is an extremely rare surname, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Tvardauskas | United Kingdom, Brazil, Lithuania |
| vytautas kastytis tvardauskas Lithuanian journalist (1922-2003), LT (b. 1922) |
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