Cognomen Szena (Szena 
) , in the world, is a very rare last name. The last name Szena is characteristic of Hungary, where it is a rare surname, Australia, where it is a very rare surname, and Turkey, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Hungary, Australia, and the United States. Very seldom, Szena is the forename as well as the last name.