Family name Tomaševičius (Tomaševičius 
) , worldwide, is a very rare last name. The cognomen Tomaševičius is habitual in Northern Europe, particularly Lithuania, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Tomaševičius | Lithuania |
|
jonas tomaševičius LT (b. 1937) |
|
|
vytautas tomaševičius Lithuanian artist, LT (b. 1972) |
|
| josifas tomaševičius |
|
Tomas, Henrikas, and Kristijonas