Last name Tvan (Тван 
, Tvan 
) , in the entire world, is a very rare family name. The last name Tvan is habitual in Malaysia, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and Ukraine. Not in comparison with a country's population, the name is most common in Malaysia, China, and India. Likewise, Tvan is the forename as well as the last name.