Cognomen Deliia (Делия 
, Дэлия , Deliia 
) , all around the world, is a rare surname. The cognomen Deliia is habitual in Estonia, where it is a rare surname, Belarus, and Russia. Measured by absolute frequency, it is commonest in Russia, Belarus, and Kazakhstan. Likewise, Deliia is the forename as well as the last name.