Last name Delii (Делий 
, Delii 
) , in the world, is a rare cognomen. The surname Delii is characteristic of the Democratic Republic of the Congo, where it is a rare surname, Russia, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. In absolute terms, it is the most numerous in the Democratic Republic of the Congo, Russia, and India. Very seldom, Delii is the forename as well as the last name.