Cognomen Korneliia (Корнелия 
, Korneliia 
) , all over the world, is a very rare family name. The cognomen Korneliia is characteristic of Eastern Europe, particularly Bulgaria, where it is quite a rare surname, Belarus, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. In absolute terms, it is commonest in Eastern Europe, particularly Bulgaria, Belarus, and Russia. More prevalently, Korneliia is the forename as well as the last name.